diff options
Diffstat (limited to 'src/mainboard/google/link/intel_dp.c')
| -rw-r--r-- | src/mainboard/google/link/intel_dp.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/src/mainboard/google/link/intel_dp.c b/src/mainboard/google/link/intel_dp.c deleted file mode 100644 index f74743aab1..0000000000 --- a/src/mainboard/google/link/intel_dp.c +++ /dev/null @@ -1,166 +0,0 @@ -/* - * Copyright 2013 Google Inc. - * Copyright © 2008 Intel Corporation - * - * 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, sublicense, - * 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 NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS 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. - * - * Authors: - * Keith Packard <keithp@keithp.com> - * - */ - -#include <console/console.h> -#include <stdint.h> -#include <delay.h> -#include "i915io.h" - -u32 -pack_aux(u32 *src32, int src_bytes) -{ - u8 *src = (u8 *)src32; - int i; - u32 v = 0; - - if (src_bytes > 4) - src_bytes = 4; - for (i = 0; i < src_bytes; i++) - v |= ((u32) src[i]) << ((3-i) * 8); - return v; -} - -void -unpack_aux(u32 src, u32 *dst32, int dst_bytes) -{ - u8 *dst = (u8 *)dst32; - - int i; - if (dst_bytes > 4) - dst_bytes = 4; - for (i = 0; i < dst_bytes; i++) - dst[i] = src >> ((3-i) * 8); -} - -int -intel_dp_aux_ch(u32 ch_ctl, u32 ch_data, u32 *send, int send_bytes, - u32 *recv, int recv_size) -{ - int i; - int recv_bytes; - u32 status; - u32 aux_clock_divider; - int try, precharge = 5; - - /* The clock divider is based off the hrawclk, - * and would like to run at 2MHz. So, take the - * hrawclk value and divide by 2 and use that - * - * Note that PCH attached eDP panels should use a 125MHz input - * clock divider. - */ - /* 200 on link */ - aux_clock_divider = 200; /* SNB & IVB eDP input clock at 400Mhz */ - - /* Try to wait for any previous AUX channel activity */ - for (try = 0; try < 3; try++) { - status = io_i915_READ32(ch_ctl); - if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) - break; - udelay(1000); - } - - if (try == 3) { - printk(BIOS_SPEW, "[000000.0] [drm:%s], ", __func__); - printk(BIOS_SPEW, "dp_aux_ch not started status 0x%08lx\n", - io_i915_READ32(ch_ctl)); - return -1; - } - - /* Must try at least 3 times according to DP spec */ - for (try = 0; try < 5; try++) { - /* Load the send data into the aux channel data registers */ - for (i = 0; i < send_bytes; i += 4) - io_i915_WRITE32(send[i], ch_data + i); - - /* Send the command and wait for it to complete */ - io_i915_WRITE32( - DP_AUX_CH_CTL_SEND_BUSY | - DP_AUX_CH_CTL_TIME_OUT_400us | - (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | - (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | - (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) | - DP_AUX_CH_CTL_DONE | - DP_AUX_CH_CTL_TIME_OUT_ERROR | - DP_AUX_CH_CTL_RECEIVE_ERROR, ch_ctl); - for (;;) { - status = io_i915_READ32(ch_ctl); - if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) - break; - udelay(100); - } - - /* Clear done status and any errors */ - io_i915_WRITE32( - status | - DP_AUX_CH_CTL_DONE | - DP_AUX_CH_CTL_TIME_OUT_ERROR | - DP_AUX_CH_CTL_RECEIVE_ERROR, ch_ctl); - - if (status & (DP_AUX_CH_CTL_TIME_OUT_ERROR | - DP_AUX_CH_CTL_RECEIVE_ERROR)) - continue; - if (status & DP_AUX_CH_CTL_DONE) - break; - } - - if ((status & DP_AUX_CH_CTL_DONE) == 0) { - printk(BIOS_SPEW, "[000000.0] [drm:%s], ", __func__); - printk(BIOS_SPEW, "dp_aux_ch not done status 0x%08x\n", status); - return -1; - } - - /* Check for timeout or receive error. - * Timeouts occur when the sink is not connected - */ - if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { - printk(BIOS_SPEW, "[000000.0] [drm:%s], ", __func__); - printk(BIOS_SPEW, "dp_aux_ch receive error status 0x%08x\n", status); - return -1; - } - - /* Timeouts occur when the device isn't connected, so they're - * "normal" -- don't fill the kernel log with these */ - if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { - printk(BIOS_SPEW, "[000000.0] [drm:%s], ", __func__); - printk(BIOS_SPEW, "dp_aux_ch timeout status 0x%08x\n", status); - return -1; - } - - /* Unload any bytes sent back from the other side */ - recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> - DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); - if (recv_bytes > recv_size) - recv_bytes = recv_size; - - for (i = 0; i < recv_bytes; i += 4) - unpack_aux(io_i915_READ32(ch_data + i), - recv + i, recv_bytes - i); - - return recv_bytes; -} |