diff options
author | Alex Deucher <alexdeucher@gmail.com> | 2009-11-10 15:59:44 -0500 |
---|---|---|
committer | Dave Airlie <airlied@redhat.com> | 2009-12-02 11:36:39 +1000 |
commit | 9b9fe72488a3a637e0550cc888e3f7a8f70e521e (patch) | |
tree | 5739a07ba9a57c58174f79a065e547e92aafe3df /drivers/gpu | |
parent | ab1e9ea08f1e94639b2d21a6bde5b55d31b1deee (diff) | |
download | op-kernel-dev-9b9fe72488a3a637e0550cc888e3f7a8f70e521e.zip op-kernel-dev-9b9fe72488a3a637e0550cc888e3f7a8f70e521e.tar.gz |
drm/radeon/kms: clean up i2c
- Change reg/mask names to match what we use internally
and in the bios
- Clarify how i2c over gpio on radeon actually works
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_atombios.c | 16 | ||||
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_combios.c | 56 | ||||
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_display.c | 8 | ||||
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_i2c.c | 43 | ||||
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_mode.h | 30 |
5 files changed, 86 insertions, 67 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c index 2ed88a8..cd07c0e 100644 --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -82,18 +82,18 @@ static inline struct radeon_i2c_bus_rec radeon_lookup_gpio(struct drm_device i2c.mask_clk_reg = le16_to_cpu(gpio.usClkMaskRegisterIndex) * 4; i2c.mask_data_reg = le16_to_cpu(gpio.usDataMaskRegisterIndex) * 4; - i2c.put_clk_reg = le16_to_cpu(gpio.usClkEnRegisterIndex) * 4; - i2c.put_data_reg = le16_to_cpu(gpio.usDataEnRegisterIndex) * 4; - i2c.get_clk_reg = le16_to_cpu(gpio.usClkY_RegisterIndex) * 4; - i2c.get_data_reg = le16_to_cpu(gpio.usDataY_RegisterIndex) * 4; + i2c.en_clk_reg = le16_to_cpu(gpio.usClkEnRegisterIndex) * 4; + i2c.en_data_reg = le16_to_cpu(gpio.usDataEnRegisterIndex) * 4; + i2c.y_clk_reg = le16_to_cpu(gpio.usClkY_RegisterIndex) * 4; + i2c.y_data_reg = le16_to_cpu(gpio.usDataY_RegisterIndex) * 4; i2c.a_clk_reg = le16_to_cpu(gpio.usClkA_RegisterIndex) * 4; i2c.a_data_reg = le16_to_cpu(gpio.usDataA_RegisterIndex) * 4; i2c.mask_clk_mask = (1 << gpio.ucClkMaskShift); i2c.mask_data_mask = (1 << gpio.ucDataMaskShift); - i2c.put_clk_mask = (1 << gpio.ucClkEnShift); - i2c.put_data_mask = (1 << gpio.ucDataEnShift); - i2c.get_clk_mask = (1 << gpio.ucClkY_Shift); - i2c.get_data_mask = (1 << gpio.ucDataY_Shift); + i2c.en_clk_mask = (1 << gpio.ucClkEnShift); + i2c.en_data_mask = (1 << gpio.ucDataEnShift); + i2c.y_clk_mask = (1 << gpio.ucClkY_Shift); + i2c.y_data_mask = (1 << gpio.ucDataY_Shift); i2c.a_clk_mask = (1 << gpio.ucClkA_Shift); i2c.a_data_mask = (1 << gpio.ucDataA_Shift); i2c.valid = true; diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c index 5253cbf..e2a51de 100644 --- a/drivers/gpu/drm/radeon/radeon_combios.c +++ b/drivers/gpu/drm/radeon/radeon_combios.c @@ -450,29 +450,29 @@ struct radeon_i2c_bus_rec combios_setup_i2c_bus(int ddc_line) i2c.mask_data_mask = RADEON_GPIO_EN_0; i2c.a_clk_mask = RADEON_GPIO_A_1; i2c.a_data_mask = RADEON_GPIO_A_0; - i2c.put_clk_mask = RADEON_GPIO_EN_1; - i2c.put_data_mask = RADEON_GPIO_EN_0; - i2c.get_clk_mask = RADEON_GPIO_Y_1; - i2c.get_data_mask = RADEON_GPIO_Y_0; + i2c.en_clk_mask = RADEON_GPIO_EN_1; + i2c.en_data_mask = RADEON_GPIO_EN_0; + i2c.y_clk_mask = RADEON_GPIO_Y_1; + i2c.y_data_mask = RADEON_GPIO_Y_0; if ((ddc_line == RADEON_LCD_GPIO_MASK) || (ddc_line == RADEON_MDGPIO_EN_REG)) { i2c.mask_clk_reg = ddc_line; i2c.mask_data_reg = ddc_line; i2c.a_clk_reg = ddc_line; i2c.a_data_reg = ddc_line; - i2c.put_clk_reg = ddc_line; - i2c.put_data_reg = ddc_line; - i2c.get_clk_reg = ddc_line + 4; - i2c.get_data_reg = ddc_line + 4; + i2c.en_clk_reg = ddc_line; + i2c.en_data_reg = ddc_line; + i2c.y_clk_reg = ddc_line + 4; + i2c.y_data_reg = ddc_line + 4; } else { i2c.mask_clk_reg = ddc_line; i2c.mask_data_reg = ddc_line; i2c.a_clk_reg = ddc_line; i2c.a_data_reg = ddc_line; - i2c.put_clk_reg = ddc_line; - i2c.put_data_reg = ddc_line; - i2c.get_clk_reg = ddc_line; - i2c.get_data_reg = ddc_line; + i2c.en_clk_reg = ddc_line; + i2c.en_data_reg = ddc_line; + i2c.y_clk_reg = ddc_line; + i2c.y_data_reg = ddc_line; } if (ddc_line) @@ -1567,18 +1567,18 @@ static bool radeon_apply_legacy_quirks(struct drm_device *dev, ddc_i2c->mask_data_mask = 0x80; ddc_i2c->a_clk_mask = (0x20 << 8); ddc_i2c->a_data_mask = 0x80; - ddc_i2c->put_clk_mask = (0x20 << 8); - ddc_i2c->put_data_mask = 0x80; - ddc_i2c->get_clk_mask = (0x20 << 8); - ddc_i2c->get_data_mask = 0x80; + ddc_i2c->en_clk_mask = (0x20 << 8); + ddc_i2c->en_data_mask = 0x80; + ddc_i2c->y_clk_mask = (0x20 << 8); + ddc_i2c->y_data_mask = 0x80; ddc_i2c->mask_clk_reg = RADEON_GPIOPAD_MASK; ddc_i2c->mask_data_reg = RADEON_GPIOPAD_MASK; ddc_i2c->a_clk_reg = RADEON_GPIOPAD_A; ddc_i2c->a_data_reg = RADEON_GPIOPAD_A; - ddc_i2c->put_clk_reg = RADEON_GPIOPAD_EN; - ddc_i2c->put_data_reg = RADEON_GPIOPAD_EN; - ddc_i2c->get_clk_reg = RADEON_LCD_GPIO_Y_REG; - ddc_i2c->get_data_reg = RADEON_LCD_GPIO_Y_REG; + ddc_i2c->en_clk_reg = RADEON_GPIOPAD_EN; + ddc_i2c->en_data_reg = RADEON_GPIOPAD_EN; + ddc_i2c->y_clk_reg = RADEON_LCD_GPIO_Y_REG; + ddc_i2c->y_data_reg = RADEON_LCD_GPIO_Y_REG; } /* Certain IBM chipset RN50s have a BIOS reporting two VGAs, @@ -1939,13 +1939,13 @@ bool radeon_get_legacy_connector_info_from_bios(struct drm_device *dev) RBIOS32(lcd_ddc_info + 3); ddc_i2c.a_data_mask = RBIOS32(lcd_ddc_info + 7); - ddc_i2c.put_clk_mask = + ddc_i2c.en_clk_mask = RBIOS32(lcd_ddc_info + 3); - ddc_i2c.put_data_mask = + ddc_i2c.en_data_mask = RBIOS32(lcd_ddc_info + 7); - ddc_i2c.get_clk_mask = + ddc_i2c.y_clk_mask = RBIOS32(lcd_ddc_info + 3); - ddc_i2c.get_data_mask = + ddc_i2c.y_data_mask = RBIOS32(lcd_ddc_info + 7); break; case DDC_GPIO: @@ -1960,13 +1960,13 @@ bool radeon_get_legacy_connector_info_from_bios(struct drm_device *dev) RBIOS32(lcd_ddc_info + 3); ddc_i2c.a_data_mask = RBIOS32(lcd_ddc_info + 7); - ddc_i2c.put_clk_mask = + ddc_i2c.en_clk_mask = RBIOS32(lcd_ddc_info + 3); - ddc_i2c.put_data_mask = + ddc_i2c.en_data_mask = RBIOS32(lcd_ddc_info + 7); - ddc_i2c.get_clk_mask = + ddc_i2c.y_clk_mask = RBIOS32(lcd_ddc_info + 3); - ddc_i2c.get_data_mask = + ddc_i2c.y_data_mask = RBIOS32(lcd_ddc_info + 7); break; default: diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c index a3def19..8b117e8 100644 --- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -270,10 +270,10 @@ static void radeon_print_display_setup(struct drm_device *dev) radeon_connector->ddc_bus->rec.mask_data_reg, radeon_connector->ddc_bus->rec.a_clk_reg, radeon_connector->ddc_bus->rec.a_data_reg, - radeon_connector->ddc_bus->rec.put_clk_reg, - radeon_connector->ddc_bus->rec.put_data_reg, - radeon_connector->ddc_bus->rec.get_clk_reg, - radeon_connector->ddc_bus->rec.get_data_reg); + radeon_connector->ddc_bus->rec.en_clk_reg, + radeon_connector->ddc_bus->rec.en_data_reg, + radeon_connector->ddc_bus->rec.y_clk_reg, + radeon_connector->ddc_bus->rec.y_data_reg); DRM_INFO(" Encoders:\n"); list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { radeon_encoder = to_radeon_encoder(encoder); diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c index d8296ac..e97a391 100644 --- a/drivers/gpu/drm/radeon/radeon_i2c.c +++ b/drivers/gpu/drm/radeon/radeon_i2c.c @@ -78,16 +78,16 @@ void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state) R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3))); } } - if (lock_state) { - temp = RREG32(rec->a_clk_reg); - temp &= ~(rec->a_clk_mask); - WREG32(rec->a_clk_reg, temp); - - temp = RREG32(rec->a_data_reg); - temp &= ~(rec->a_data_mask); - WREG32(rec->a_data_reg, temp); - } + /* clear the output pin values */ + temp = RREG32(rec->a_clk_reg) & ~rec->a_clk_mask; + WREG32(rec->a_clk_reg, temp); + + temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask; + WREG32(rec->a_data_reg, temp); + + + /* mask the gpio pins for software use */ temp = RREG32(rec->mask_clk_reg); if (lock_state) temp |= rec->mask_clk_mask; @@ -112,8 +112,9 @@ static int get_clock(void *i2c_priv) struct radeon_i2c_bus_rec *rec = &i2c->rec; uint32_t val; - val = RREG32(rec->get_clk_reg); - val &= rec->get_clk_mask; + /* read the value off the pin */ + val = RREG32(rec->y_clk_reg); + val &= rec->y_clk_mask; return (val != 0); } @@ -126,8 +127,10 @@ static int get_data(void *i2c_priv) struct radeon_i2c_bus_rec *rec = &i2c->rec; uint32_t val; - val = RREG32(rec->get_data_reg); - val &= rec->get_data_mask; + /* read the value off the pin */ + val = RREG32(rec->y_data_reg); + val &= rec->y_data_mask; + return (val != 0); } @@ -138,9 +141,10 @@ static void set_clock(void *i2c_priv, int clock) struct radeon_i2c_bus_rec *rec = &i2c->rec; uint32_t val; - val = RREG32(rec->put_clk_reg) & (uint32_t)~(rec->put_clk_mask); - val |= clock ? 0 : rec->put_clk_mask; - WREG32(rec->put_clk_reg, val); + /* set pin direction */ + val = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask; + val |= clock ? 0 : rec->en_clk_mask; + WREG32(rec->en_clk_reg, val); } static void set_data(void *i2c_priv, int data) @@ -150,9 +154,10 @@ static void set_data(void *i2c_priv, int data) struct radeon_i2c_bus_rec *rec = &i2c->rec; uint32_t val; - val = RREG32(rec->put_data_reg) & (uint32_t)~(rec->put_data_mask); - val |= data ? 0 : rec->put_data_mask; - WREG32(rec->put_data_reg, val); + /* set pin direction */ + val = RREG32(rec->en_data_reg) & ~rec->en_data_mask; + val |= data ? 0 : rec->en_data_mask; + WREG32(rec->en_data_reg, val); } struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev, diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h index 491a1ec..20847a2 100644 --- a/drivers/gpu/drm/radeon/radeon_mode.h +++ b/drivers/gpu/drm/radeon/radeon_mode.h @@ -89,24 +89,38 @@ enum radeon_tv_std { TV_STD_PAL_CN, }; +/* radeon gpio-based i2c + * 1. "mask" reg and bits + * grabs the gpio pins for software use + * 0=not held 1=held + * 2. "a" reg and bits + * output pin value + * 0=low 1=high + * 3. "en" reg and bits + * sets the pin direction + * 0=input 1=output + * 4. "y" reg and bits + * input pin value + * 0=low 1=high + */ struct radeon_i2c_bus_rec { bool valid; uint32_t mask_clk_reg; uint32_t mask_data_reg; uint32_t a_clk_reg; uint32_t a_data_reg; - uint32_t put_clk_reg; - uint32_t put_data_reg; - uint32_t get_clk_reg; - uint32_t get_data_reg; + uint32_t en_clk_reg; + uint32_t en_data_reg; + uint32_t y_clk_reg; + uint32_t y_data_reg; uint32_t mask_clk_mask; uint32_t mask_data_mask; - uint32_t put_clk_mask; - uint32_t put_data_mask; - uint32_t get_clk_mask; - uint32_t get_data_mask; uint32_t a_clk_mask; uint32_t a_data_mask; + uint32_t en_clk_mask; + uint32_t en_data_mask; + uint32_t y_clk_mask; + uint32_t y_data_mask; }; struct radeon_tmds_pll { |