viafb: via_utility.c, via_utility.h, vt1636.c, vt1636.h

via_utility.c, via_utility.h: support user mode application with
additional information vt1636.c, vt1636.h: setting for chip vt1636

Signed-off-by: Joseph Chan <josephchan@via.com.tw>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 306 insertions, 0 deletions

diff --git a/drivers/video/via/vt1636.c b/drivers/video/via/vt1636.c
new file mode 100644
index 000000000000..322a9f993550
--- /dev/null
+++ b/drivers/video/via/vt1636.c
@@ -0,0 +1,306 @@
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation;
+ * either version 2, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.See the GNU General Public License
+ * for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "global.h"
+
+u8 viafb_gpio_i2c_read_lvds(struct lvds_setting_information
+        *plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
+        u8 index)
+{
+        u8 data;
+
+        viaparinfo->i2c_stuff.i2c_port = plvds_chip_info->i2c_port;
+        viafb_i2c_readbyte(plvds_chip_info->lvds_chip_slave_addr, index, &data);
+
+        return data;
+}
+
+void viafb_gpio_i2c_write_mask_lvds(struct lvds_setting_information
+                              *plvds_setting_info, struct lvds_chip_information
+                              *plvds_chip_info, struct IODATA io_data)
+{
+        int index, data;
+
+        viaparinfo->i2c_stuff.i2c_port = plvds_chip_info->i2c_port;
+
+        index = io_data.Index;
+        data = viafb_gpio_i2c_read_lvds(plvds_setting_info, plvds_chip_info,
+                index);
+        data = (data & (~io_data.Mask)) | io_data.Data;
+
+        viafb_i2c_writebyte(plvds_chip_info->lvds_chip_slave_addr, index, data);
+}
+
+void viafb_init_lvds_vt1636(struct lvds_setting_information
+        *plvds_setting_info, struct lvds_chip_information *plvds_chip_info)
+{
+        int reg_num, i;
+
+        /* Common settings: */
+        reg_num = ARRAY_SIZE(COMMON_INIT_TBL_VT1636);
+
+        for (i = 0; i < reg_num; i++) {
+                viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
+                                         plvds_chip_info,
+                                         COMMON_INIT_TBL_VT1636[i]);
+        }
+
+        /* Input Data Mode Select */
+        if (plvds_setting_info->device_lcd_dualedge) {
+                viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
+                                         plvds_chip_info,
+                                         DUAL_CHANNEL_ENABLE_TBL_VT1636[0]);
+        } else {
+                viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
+                                         plvds_chip_info,
+                                         SINGLE_CHANNEL_ENABLE_TBL_VT1636[0]);
+        }
+
+        if (plvds_setting_info->LCDDithering) {
+                viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
+                                         plvds_chip_info,
+                                         DITHERING_ENABLE_TBL_VT1636[0]);
+        } else {
+                viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
+                                         plvds_chip_info,
+                                         DITHERING_DISABLE_TBL_VT1636[0]);
+        }
+}
+
+void viafb_enable_lvds_vt1636(struct lvds_setting_information
+                        *plvds_setting_info,
+                        struct lvds_chip_information *plvds_chip_info)
+{
+
+        viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
+                                 VDD_ON_TBL_VT1636[0]);
+
+        /* Pad on: */
+        switch (plvds_chip_info->output_interface) {
+        case INTERFACE_DVP0:
+                {
+                        viafb_write_reg_mask(SR1E, VIASR, 0xC0, 0xC0);
+                        break;
+                }
+
+        case INTERFACE_DVP1:
+                {
+                        viafb_write_reg_mask(SR1E, VIASR, 0x30, 0x30);
+                        break;
+                }
+
+        case INTERFACE_DFP_LOW:
+                {
+                        viafb_write_reg_mask(SR2A, VIASR, 0x03, 0x03);
+                        break;
+                }
+
+        case INTERFACE_DFP_HIGH:
+                {
+                        viafb_write_reg_mask(SR2A, VIASR, 0x03, 0x0C);
+                        break;
+                }
+
+        }
+}
+
+void viafb_disable_lvds_vt1636(struct lvds_setting_information
+                         *plvds_setting_info,
+                         struct lvds_chip_information *plvds_chip_info)
+{
+
+        viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
+                                 VDD_OFF_TBL_VT1636[0]);
+
+        /* Pad off: */
+        switch (plvds_chip_info->output_interface) {
+        case INTERFACE_DVP0:
+                {
+                        viafb_write_reg_mask(SR1E, VIASR, 0x00, 0xC0);
+                        break;
+                }
+
+        case INTERFACE_DVP1:
+                {
+                        viafb_write_reg_mask(SR1E, VIASR, 0x00, 0x30);
+                        break;
+                }
+
+        case INTERFACE_DFP_LOW:
+                {
+                        viafb_write_reg_mask(SR2A, VIASR, 0x00, 0x03);
+                        break;
+                }
+
+        case INTERFACE_DFP_HIGH:
+                {
+                        viafb_write_reg_mask(SR2A, VIASR, 0x00, 0x0C);
+                        break;
+                }
+
+        }
+}
+
+bool viafb_lvds_identify_vt1636(void)
+{
+        u8 Buffer[2];
+
+        DEBUG_MSG(KERN_INFO "viafb_lvds_identify_vt1636.\n");
+
+        /* Sense VT1636 LVDS Transmiter */
+        viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
+        VT1636_LVDS_I2C_ADDR;
+
+        /* Check vendor ID first: */
+        viafb_i2c_readbyte((u8) viaparinfo->chip_info->lvds_chip_info.
+        lvds_chip_slave_addr,
+                    0x00, &Buffer[0]);
+        viafb_i2c_readbyte((u8) viaparinfo->chip_info->lvds_chip_info.
+                lvds_chip_slave_addr,
+                    0x01, &Buffer[1]);
+
+        if (!((Buffer[0] == 0x06) && (Buffer[1] == 0x11)))
+                return false;
+
+        /* Check Chip ID: */
+        viafb_i2c_readbyte((u8) viaparinfo->chip_info->lvds_chip_info.
+        lvds_chip_slave_addr,
+                    0x02, &Buffer[0]);
+        viafb_i2c_readbyte((u8) viaparinfo->chip_info->lvds_chip_info.
+                lvds_chip_slave_addr,
+                    0x03, &Buffer[1]);
+        if ((Buffer[0] == 0x45) && (Buffer[1] == 0x33)) {
+                viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
+                        VT1636_LVDS;
+                return true;
+        }
+
+        return false;
+}
+
+static int get_clk_range_index(u32 Clk)
+{
+        if (Clk < DPA_CLK_30M)
+                return DPA_CLK_RANGE_30M;
+        else if (Clk < DPA_CLK_50M)
+                return DPA_CLK_RANGE_30_50M;
+        else if (Clk < DPA_CLK_70M)
+                return DPA_CLK_RANGE_50_70M;
+        else if (Clk < DPA_CLK_100M)
+                return DPA_CLK_RANGE_70_100M;
+        else if (Clk < DPA_CLK_150M)
+                return DPA_CLK_RANGE_100_150M;
+        else
+                return DPA_CLK_RANGE_150M;
+}
+
+static int get_lvds_dpa_setting_index(int panel_size_id,
+                             struct VT1636_DPA_SETTING *p_vt1636_dpasetting_tbl,
+                               int tbl_size)
+{
+        int i;
+
+        for (i = 0; i < tbl_size; i++) {
+                if (panel_size_id == p_vt1636_dpasetting_tbl->PanelSizeID)
+                        return i;
+
+                p_vt1636_dpasetting_tbl++;
+        }
+
+        return 0;
+}
+
+static void set_dpa_vt1636(struct lvds_setting_information
+        *plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
+                    struct VT1636_DPA_SETTING *p_vt1636_dpa_setting)
+{
+        struct IODATA io_data;
+
+        io_data.Index = 0x09;
+        io_data.Mask = 0x1F;
+        io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST1;
+        viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
+                plvds_chip_info, io_data);
+
+        io_data.Index = 0x08;
+        io_data.Mask = 0x0F;
+        io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST2;
+        viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
+                io_data);
+}
+
+void viafb_vt1636_patch_skew_on_vt3324(
+        struct lvds_setting_information *plvds_setting_info,
+        struct lvds_chip_information *plvds_chip_info)
+{
+        int index, size;
+
+        DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3324.\n");
+
+        /* Graphics DPA settings: */
+        index = get_clk_range_index(plvds_setting_info->vclk);
+        viafb_set_dpa_gfx(plvds_chip_info->output_interface,
+                    &GFX_DPA_SETTING_TBL_VT3324[index]);
+
+        /* LVDS Transmitter DPA settings: */
+        size = ARRAY_SIZE(VT1636_DPA_SETTING_TBL_VT3324);
+        index =
+            get_lvds_dpa_setting_index(plvds_setting_info->lcd_panel_id,
+                                       VT1636_DPA_SETTING_TBL_VT3324, size);
+        set_dpa_vt1636(plvds_setting_info, plvds_chip_info,
+                       &VT1636_DPA_SETTING_TBL_VT3324[index]);
+}
+
+void viafb_vt1636_patch_skew_on_vt3327(
+        struct lvds_setting_information *plvds_setting_info,
+        struct lvds_chip_information *plvds_chip_info)
+{
+        int index, size;
+
+        DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3327.\n");
+
+        /* Graphics DPA settings: */
+        index = get_clk_range_index(plvds_setting_info->vclk);
+        viafb_set_dpa_gfx(plvds_chip_info->output_interface,
+                    &GFX_DPA_SETTING_TBL_VT3327[index]);
+
+        /* LVDS Transmitter DPA settings: */
+        size = ARRAY_SIZE(VT1636_DPA_SETTING_TBL_VT3327);
+        index =
+            get_lvds_dpa_setting_index(plvds_setting_info->lcd_panel_id,
+                                       VT1636_DPA_SETTING_TBL_VT3327, size);
+        set_dpa_vt1636(plvds_setting_info, plvds_chip_info,
+                       &VT1636_DPA_SETTING_TBL_VT3327[index]);
+}
+
+void viafb_vt1636_patch_skew_on_vt3364(
+        struct lvds_setting_information *plvds_setting_info,
+        struct lvds_chip_information *plvds_chip_info)
+{
+        int index;
+
+        DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3364.\n");
+
+        /* Graphics DPA settings: */
+        index = get_clk_range_index(plvds_setting_info->vclk);
+        viafb_set_dpa_gfx(plvds_chip_info->output_interface,
+                    &GFX_DPA_SETTING_TBL_VT3364[index]);
+}