diff options
Diffstat (limited to 'drivers/gpu/drm/i2c/sil164_drv.c')
| -rw-r--r-- | drivers/gpu/drm/i2c/sil164_drv.c | 451 |
1 files changed, 0 insertions, 451 deletions
diff --git a/drivers/gpu/drm/i2c/sil164_drv.c b/drivers/gpu/drm/i2c/sil164_drv.c deleted file mode 100644 index ff23422727fc..000000000000 --- a/drivers/gpu/drm/i2c/sil164_drv.c +++ /dev/null @@ -1,451 +0,0 @@ -/* - * Copyright (C) 2010 Francisco Jerez. - * 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, 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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 <linux/module.h> - -#include <drm/drm_drv.h> -#include <drm/drm_encoder_slave.h> -#include <drm/drm_print.h> -#include <drm/drm_probe_helper.h> -#include <drm/i2c/sil164.h> - -struct sil164_priv { - struct sil164_encoder_params config; - struct i2c_client *duallink_slave; - - uint8_t saved_state[0x10]; - uint8_t saved_slave_state[0x10]; -}; - -#define to_sil164_priv(x) \ - ((struct sil164_priv *)to_encoder_slave(x)->slave_priv) - -#define sil164_dbg(client, format, ...) do { \ - if (drm_debug_enabled(DRM_UT_KMS)) \ - dev_printk(KERN_DEBUG, &client->dev, \ - "%s: " format, __func__, ## __VA_ARGS__); \ - } while (0) -#define sil164_info(client, format, ...) \ - dev_info(&client->dev, format, __VA_ARGS__) -#define sil164_err(client, format, ...) \ - dev_err(&client->dev, format, __VA_ARGS__) - -#define SIL164_I2C_ADDR_MASTER 0x38 -#define SIL164_I2C_ADDR_SLAVE 0x39 - -/* HW register definitions */ - -#define SIL164_VENDOR_LO 0x0 -#define SIL164_VENDOR_HI 0x1 -#define SIL164_DEVICE_LO 0x2 -#define SIL164_DEVICE_HI 0x3 -#define SIL164_REVISION 0x4 -#define SIL164_FREQ_MIN 0x6 -#define SIL164_FREQ_MAX 0x7 -#define SIL164_CONTROL0 0x8 -# define SIL164_CONTROL0_POWER_ON 0x01 -# define SIL164_CONTROL0_EDGE_RISING 0x02 -# define SIL164_CONTROL0_INPUT_24BIT 0x04 -# define SIL164_CONTROL0_DUAL_EDGE 0x08 -# define SIL164_CONTROL0_HSYNC_ON 0x10 -# define SIL164_CONTROL0_VSYNC_ON 0x20 -#define SIL164_DETECT 0x9 -# define SIL164_DETECT_INTR_STAT 0x01 -# define SIL164_DETECT_HOTPLUG_STAT 0x02 -# define SIL164_DETECT_RECEIVER_STAT 0x04 -# define SIL164_DETECT_INTR_MODE_RECEIVER 0x00 -# define SIL164_DETECT_INTR_MODE_HOTPLUG 0x08 -# define SIL164_DETECT_OUT_MODE_HIGH 0x00 -# define SIL164_DETECT_OUT_MODE_INTR 0x10 -# define SIL164_DETECT_OUT_MODE_RECEIVER 0x20 -# define SIL164_DETECT_OUT_MODE_HOTPLUG 0x30 -# define SIL164_DETECT_VSWING_STAT 0x80 -#define SIL164_CONTROL1 0xa -# define SIL164_CONTROL1_DESKEW_ENABLE 0x10 -# define SIL164_CONTROL1_DESKEW_INCR_SHIFT 5 -#define SIL164_GPIO 0xb -#define SIL164_CONTROL2 0xc -# define SIL164_CONTROL2_FILTER_ENABLE 0x01 -# define SIL164_CONTROL2_FILTER_SETTING_SHIFT 1 -# define SIL164_CONTROL2_DUALLINK_MASTER 0x40 -# define SIL164_CONTROL2_SYNC_CONT 0x80 -#define SIL164_DUALLINK 0xd -# define SIL164_DUALLINK_ENABLE 0x10 -# define SIL164_DUALLINK_SKEW_SHIFT 5 -#define SIL164_PLLZONE 0xe -# define SIL164_PLLZONE_STAT 0x08 -# define SIL164_PLLZONE_FORCE_ON 0x10 -# define SIL164_PLLZONE_FORCE_HIGH 0x20 - -/* HW access functions */ - -static void -sil164_write(struct i2c_client *client, uint8_t addr, uint8_t val) -{ - uint8_t buf[] = {addr, val}; - int ret; - - ret = i2c_master_send(client, buf, ARRAY_SIZE(buf)); - if (ret < 0) - sil164_err(client, "Error %d writing to subaddress 0x%x\n", - ret, addr); -} - -static uint8_t -sil164_read(struct i2c_client *client, uint8_t addr) -{ - uint8_t val; - int ret; - - ret = i2c_master_send(client, &addr, sizeof(addr)); - if (ret < 0) - goto fail; - - ret = i2c_master_recv(client, &val, sizeof(val)); - if (ret < 0) - goto fail; - - return val; - -fail: - sil164_err(client, "Error %d reading from subaddress 0x%x\n", - ret, addr); - return 0; -} - -static void -sil164_save_state(struct i2c_client *client, uint8_t *state) -{ - int i; - - for (i = 0x8; i <= 0xe; i++) - state[i] = sil164_read(client, i); -} - -static void -sil164_restore_state(struct i2c_client *client, uint8_t *state) -{ - int i; - - for (i = 0x8; i <= 0xe; i++) - sil164_write(client, i, state[i]); -} - -static void -sil164_set_power_state(struct i2c_client *client, bool on) -{ - uint8_t control0 = sil164_read(client, SIL164_CONTROL0); - - if (on) - control0 |= SIL164_CONTROL0_POWER_ON; - else - control0 &= ~SIL164_CONTROL0_POWER_ON; - - sil164_write(client, SIL164_CONTROL0, control0); -} - -static void -sil164_init_state(struct i2c_client *client, - struct sil164_encoder_params *config, - bool duallink) -{ - sil164_write(client, SIL164_CONTROL0, - SIL164_CONTROL0_HSYNC_ON | - SIL164_CONTROL0_VSYNC_ON | - (config->input_edge ? SIL164_CONTROL0_EDGE_RISING : 0) | - (config->input_width ? SIL164_CONTROL0_INPUT_24BIT : 0) | - (config->input_dual ? SIL164_CONTROL0_DUAL_EDGE : 0)); - - sil164_write(client, SIL164_DETECT, - SIL164_DETECT_INTR_STAT | - SIL164_DETECT_OUT_MODE_RECEIVER); - - sil164_write(client, SIL164_CONTROL1, - (config->input_skew ? SIL164_CONTROL1_DESKEW_ENABLE : 0) | - (((config->input_skew + 4) & 0x7) - << SIL164_CONTROL1_DESKEW_INCR_SHIFT)); - - sil164_write(client, SIL164_CONTROL2, - SIL164_CONTROL2_SYNC_CONT | - (config->pll_filter ? 0 : SIL164_CONTROL2_FILTER_ENABLE) | - (4 << SIL164_CONTROL2_FILTER_SETTING_SHIFT)); - - sil164_write(client, SIL164_PLLZONE, 0); - - if (duallink) - sil164_write(client, SIL164_DUALLINK, - SIL164_DUALLINK_ENABLE | - (((config->duallink_skew + 4) & 0x7) - << SIL164_DUALLINK_SKEW_SHIFT)); - else - sil164_write(client, SIL164_DUALLINK, 0); -} - -/* DRM encoder functions */ - -static void -sil164_encoder_set_config(struct drm_encoder *encoder, void *params) -{ - struct sil164_priv *priv = to_sil164_priv(encoder); - - priv->config = *(struct sil164_encoder_params *)params; -} - -static void -sil164_encoder_dpms(struct drm_encoder *encoder, int mode) -{ - struct sil164_priv *priv = to_sil164_priv(encoder); - bool on = (mode == DRM_MODE_DPMS_ON); - bool duallink = (on && encoder->crtc->mode.clock > 165000); - - sil164_set_power_state(drm_i2c_encoder_get_client(encoder), on); - - if (priv->duallink_slave) - sil164_set_power_state(priv->duallink_slave, duallink); -} - -static void -sil164_encoder_save(struct drm_encoder *encoder) -{ - struct sil164_priv *priv = to_sil164_priv(encoder); - - sil164_save_state(drm_i2c_encoder_get_client(encoder), - priv->saved_state); - - if (priv->duallink_slave) - sil164_save_state(priv->duallink_slave, - priv->saved_slave_state); -} - -static void -sil164_encoder_restore(struct drm_encoder *encoder) -{ - struct sil164_priv *priv = to_sil164_priv(encoder); - - sil164_restore_state(drm_i2c_encoder_get_client(encoder), - priv->saved_state); - - if (priv->duallink_slave) - sil164_restore_state(priv->duallink_slave, - priv->saved_slave_state); -} - -static int -sil164_encoder_mode_valid(struct drm_encoder *encoder, - struct drm_display_mode *mode) -{ - struct sil164_priv *priv = to_sil164_priv(encoder); - - if (mode->clock < 32000) - return MODE_CLOCK_LOW; - - if (mode->clock > 330000 || - (mode->clock > 165000 && !priv->duallink_slave)) - return MODE_CLOCK_HIGH; - - return MODE_OK; -} - -static void -sil164_encoder_mode_set(struct drm_encoder *encoder, - struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode) -{ - struct sil164_priv *priv = to_sil164_priv(encoder); - bool duallink = adjusted_mode->clock > 165000; - - sil164_init_state(drm_i2c_encoder_get_client(encoder), - &priv->config, duallink); - - if (priv->duallink_slave) - sil164_init_state(priv->duallink_slave, - &priv->config, duallink); - - sil164_encoder_dpms(encoder, DRM_MODE_DPMS_ON); -} - -static enum drm_connector_status -sil164_encoder_detect(struct drm_encoder *encoder, - struct drm_connector *connector) -{ - struct i2c_client *client = drm_i2c_encoder_get_client(encoder); - - if (sil164_read(client, SIL164_DETECT) & SIL164_DETECT_HOTPLUG_STAT) - return connector_status_connected; - else - return connector_status_disconnected; -} - -static int -sil164_encoder_get_modes(struct drm_encoder *encoder, - struct drm_connector *connector) -{ - return 0; -} - -static int -sil164_encoder_create_resources(struct drm_encoder *encoder, - struct drm_connector *connector) -{ - return 0; -} - -static int -sil164_encoder_set_property(struct drm_encoder *encoder, - struct drm_connector *connector, - struct drm_property *property, - uint64_t val) -{ - return 0; -} - -static void -sil164_encoder_destroy(struct drm_encoder *encoder) -{ - struct sil164_priv *priv = to_sil164_priv(encoder); - - i2c_unregister_device(priv->duallink_slave); - - kfree(priv); - drm_i2c_encoder_destroy(encoder); -} - -static const struct drm_encoder_slave_funcs sil164_encoder_funcs = { - .set_config = sil164_encoder_set_config, - .destroy = sil164_encoder_destroy, - .dpms = sil164_encoder_dpms, - .save = sil164_encoder_save, - .restore = sil164_encoder_restore, - .mode_valid = sil164_encoder_mode_valid, - .mode_set = sil164_encoder_mode_set, - .detect = sil164_encoder_detect, - .get_modes = sil164_encoder_get_modes, - .create_resources = sil164_encoder_create_resources, - .set_property = sil164_encoder_set_property, -}; - -/* I2C driver functions */ - -static int -sil164_probe(struct i2c_client *client) -{ - int vendor = sil164_read(client, SIL164_VENDOR_HI) << 8 | - sil164_read(client, SIL164_VENDOR_LO); - int device = sil164_read(client, SIL164_DEVICE_HI) << 8 | - sil164_read(client, SIL164_DEVICE_LO); - int rev = sil164_read(client, SIL164_REVISION); - - if (vendor != 0x1 || device != 0x6) { - sil164_dbg(client, "Unknown device %x:%x.%x\n", - vendor, device, rev); - return -ENODEV; - } - - sil164_info(client, "Detected device %x:%x.%x\n", - vendor, device, rev); - - return 0; -} - -static struct i2c_client * -sil164_detect_slave(struct i2c_client *client) -{ - struct i2c_adapter *adap = client->adapter; - struct i2c_msg msg = { - .addr = SIL164_I2C_ADDR_SLAVE, - .len = 0, - }; - const struct i2c_board_info info = { - I2C_BOARD_INFO("sil164", SIL164_I2C_ADDR_SLAVE) - }; - - if (i2c_transfer(adap, &msg, 1) != 1) { - sil164_dbg(adap, "No dual-link slave found."); - return NULL; - } - - return i2c_new_client_device(adap, &info); -} - -static int -sil164_encoder_init(struct i2c_client *client, - struct drm_device *dev, - struct drm_encoder_slave *encoder) -{ - struct sil164_priv *priv; - struct i2c_client *slave_client; - - priv = kzalloc(sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - encoder->slave_priv = priv; - encoder->slave_funcs = &sil164_encoder_funcs; - - slave_client = sil164_detect_slave(client); - if (!IS_ERR(slave_client)) - priv->duallink_slave = slave_client; - - return 0; -} - -static const struct i2c_device_id sil164_ids[] = { - { "sil164", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, sil164_ids); - -static struct drm_i2c_encoder_driver sil164_driver = { - .i2c_driver = { - .probe = sil164_probe, - .driver = { - .name = "sil164", - }, - .id_table = sil164_ids, - }, - .encoder_init = sil164_encoder_init, -}; - -/* Module initialization */ - -static int __init -sil164_init(void) -{ - return drm_i2c_encoder_register(THIS_MODULE, &sil164_driver); -} - -static void __exit -sil164_exit(void) -{ - drm_i2c_encoder_unregister(&sil164_driver); -} - -MODULE_AUTHOR("Francisco Jerez <currojerez@riseup.net>"); -MODULE_DESCRIPTION("Silicon Image sil164 TMDS transmitter driver"); -MODULE_LICENSE("GPL and additional rights"); - -module_init(sil164_init); -module_exit(sil164_exit); |