| /************************************************************************** |
| |
| Copyright © 2006 Dave Airlie |
| |
| All Rights Reserved. |
| |
| 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, sub license, 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 (including the |
| next paragraph) 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 NON-INFRINGEMENT. |
| IN NO EVENT SHALL THE AUTHOR 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. |
| |
| **************************************************************************/ |
| |
| #include "intel_display_types.h" |
| #include "intel_dvo_dev.h" |
| |
| #define SIL164_VID 0x0001 |
| #define SIL164_DID 0x0006 |
| |
| #define SIL164_VID_LO 0x00 |
| #define SIL164_VID_HI 0x01 |
| #define SIL164_DID_LO 0x02 |
| #define SIL164_DID_HI 0x03 |
| #define SIL164_REV 0x04 |
| #define SIL164_RSVD 0x05 |
| #define SIL164_FREQ_LO 0x06 |
| #define SIL164_FREQ_HI 0x07 |
| |
| #define SIL164_REG8 0x08 |
| #define SIL164_8_VEN (1<<5) |
| #define SIL164_8_HEN (1<<4) |
| #define SIL164_8_DSEL (1<<3) |
| #define SIL164_8_BSEL (1<<2) |
| #define SIL164_8_EDGE (1<<1) |
| #define SIL164_8_PD (1<<0) |
| |
| #define SIL164_REG9 0x09 |
| #define SIL164_9_VLOW (1<<7) |
| #define SIL164_9_MSEL_MASK (0x7<<4) |
| #define SIL164_9_TSEL (1<<3) |
| #define SIL164_9_RSEN (1<<2) |
| #define SIL164_9_HTPLG (1<<1) |
| #define SIL164_9_MDI (1<<0) |
| |
| #define SIL164_REGC 0x0c |
| |
| struct sil164_priv { |
| //I2CDevRec d; |
| bool quiet; |
| }; |
| |
| #define SILPTR(d) ((SIL164Ptr)(d->DriverPrivate.ptr)) |
| |
| static bool sil164_readb(struct intel_dvo_device *dvo, int addr, u8 *ch) |
| { |
| struct sil164_priv *sil = dvo->dev_priv; |
| struct i2c_adapter *adapter = dvo->i2c_bus; |
| u8 out_buf[2]; |
| u8 in_buf[2]; |
| |
| struct i2c_msg msgs[] = { |
| { |
| .addr = dvo->slave_addr, |
| .flags = 0, |
| .len = 1, |
| .buf = out_buf, |
| }, |
| { |
| .addr = dvo->slave_addr, |
| .flags = I2C_M_RD, |
| .len = 1, |
| .buf = in_buf, |
| } |
| }; |
| |
| out_buf[0] = addr; |
| out_buf[1] = 0; |
| |
| if (i2c_transfer(adapter, msgs, 2) == 2) { |
| *ch = in_buf[0]; |
| return true; |
| } |
| |
| if (!sil->quiet) { |
| DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n", |
| addr, adapter->name, dvo->slave_addr); |
| } |
| return false; |
| } |
| |
| static bool sil164_writeb(struct intel_dvo_device *dvo, int addr, u8 ch) |
| { |
| struct sil164_priv *sil = dvo->dev_priv; |
| struct i2c_adapter *adapter = dvo->i2c_bus; |
| u8 out_buf[2]; |
| struct i2c_msg msg = { |
| .addr = dvo->slave_addr, |
| .flags = 0, |
| .len = 2, |
| .buf = out_buf, |
| }; |
| |
| out_buf[0] = addr; |
| out_buf[1] = ch; |
| |
| if (i2c_transfer(adapter, &msg, 1) == 1) |
| return true; |
| |
| if (!sil->quiet) { |
| DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n", |
| addr, adapter->name, dvo->slave_addr); |
| } |
| |
| return false; |
| } |
| |
| /* Silicon Image 164 driver for chip on i2c bus */ |
| static bool sil164_init(struct intel_dvo_device *dvo, |
| struct i2c_adapter *adapter) |
| { |
| /* this will detect the SIL164 chip on the specified i2c bus */ |
| struct sil164_priv *sil; |
| unsigned char ch; |
| |
| sil = kzalloc(sizeof(struct sil164_priv), GFP_KERNEL); |
| if (sil == NULL) |
| return false; |
| |
| dvo->i2c_bus = adapter; |
| dvo->dev_priv = sil; |
| sil->quiet = true; |
| |
| if (!sil164_readb(dvo, SIL164_VID_LO, &ch)) |
| goto out; |
| |
| if (ch != (SIL164_VID & 0xff)) { |
| DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n", |
| ch, adapter->name, dvo->slave_addr); |
| goto out; |
| } |
| |
| if (!sil164_readb(dvo, SIL164_DID_LO, &ch)) |
| goto out; |
| |
| if (ch != (SIL164_DID & 0xff)) { |
| DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n", |
| ch, adapter->name, dvo->slave_addr); |
| goto out; |
| } |
| sil->quiet = false; |
| |
| DRM_DEBUG_KMS("init sil164 dvo controller successfully!\n"); |
| return true; |
| |
| out: |
| kfree(sil); |
| return false; |
| } |
| |
| static enum drm_connector_status sil164_detect(struct intel_dvo_device *dvo) |
| { |
| u8 reg9; |
| |
| sil164_readb(dvo, SIL164_REG9, ®9); |
| |
| if (reg9 & SIL164_9_HTPLG) |
| return connector_status_connected; |
| else |
| return connector_status_disconnected; |
| } |
| |
| static enum drm_mode_status sil164_mode_valid(struct intel_dvo_device *dvo, |
| struct drm_display_mode *mode) |
| { |
| return MODE_OK; |
| } |
| |
| static void sil164_mode_set(struct intel_dvo_device *dvo, |
| const struct drm_display_mode *mode, |
| const struct drm_display_mode *adjusted_mode) |
| { |
| /* As long as the basics are set up, since we don't have clock |
| * dependencies in the mode setup, we can just leave the |
| * registers alone and everything will work fine. |
| */ |
| /* recommended programming sequence from doc */ |
| /*sil164_writeb(sil, 0x08, 0x30); |
| sil164_writeb(sil, 0x09, 0x00); |
| sil164_writeb(sil, 0x0a, 0x90); |
| sil164_writeb(sil, 0x0c, 0x89); |
| sil164_writeb(sil, 0x08, 0x31);*/ |
| /* don't do much */ |
| return; |
| } |
| |
| /* set the SIL164 power state */ |
| static void sil164_dpms(struct intel_dvo_device *dvo, bool enable) |
| { |
| int ret; |
| unsigned char ch; |
| |
| ret = sil164_readb(dvo, SIL164_REG8, &ch); |
| if (ret == false) |
| return; |
| |
| if (enable) |
| ch |= SIL164_8_PD; |
| else |
| ch &= ~SIL164_8_PD; |
| |
| sil164_writeb(dvo, SIL164_REG8, ch); |
| return; |
| } |
| |
| static bool sil164_get_hw_state(struct intel_dvo_device *dvo) |
| { |
| int ret; |
| unsigned char ch; |
| |
| ret = sil164_readb(dvo, SIL164_REG8, &ch); |
| if (ret == false) |
| return false; |
| |
| if (ch & SIL164_8_PD) |
| return true; |
| else |
| return false; |
| } |
| |
| static void sil164_dump_regs(struct intel_dvo_device *dvo) |
| { |
| u8 val; |
| |
| sil164_readb(dvo, SIL164_FREQ_LO, &val); |
| DRM_DEBUG_KMS("SIL164_FREQ_LO: 0x%02x\n", val); |
| sil164_readb(dvo, SIL164_FREQ_HI, &val); |
| DRM_DEBUG_KMS("SIL164_FREQ_HI: 0x%02x\n", val); |
| sil164_readb(dvo, SIL164_REG8, &val); |
| DRM_DEBUG_KMS("SIL164_REG8: 0x%02x\n", val); |
| sil164_readb(dvo, SIL164_REG9, &val); |
| DRM_DEBUG_KMS("SIL164_REG9: 0x%02x\n", val); |
| sil164_readb(dvo, SIL164_REGC, &val); |
| DRM_DEBUG_KMS("SIL164_REGC: 0x%02x\n", val); |
| } |
| |
| static void sil164_destroy(struct intel_dvo_device *dvo) |
| { |
| struct sil164_priv *sil = dvo->dev_priv; |
| |
| if (sil) { |
| kfree(sil); |
| dvo->dev_priv = NULL; |
| } |
| } |
| |
| const struct intel_dvo_dev_ops sil164_ops = { |
| .init = sil164_init, |
| .detect = sil164_detect, |
| .mode_valid = sil164_mode_valid, |
| .mode_set = sil164_mode_set, |
| .dpms = sil164_dpms, |
| .get_hw_state = sil164_get_hw_state, |
| .dump_regs = sil164_dump_regs, |
| .destroy = sil164_destroy, |
| }; |
