summaryrefslogtreecommitdiff
path: root/drivers/video/fbdev/amba-clcd-nomadik.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/video/fbdev/amba-clcd-nomadik.c')
-rw-r--r--drivers/video/fbdev/amba-clcd-nomadik.c251
1 files changed, 0 insertions, 251 deletions
diff --git a/drivers/video/fbdev/amba-clcd-nomadik.c b/drivers/video/fbdev/amba-clcd-nomadik.c
deleted file mode 100644
index cd2db1113e67..000000000000
--- a/drivers/video/fbdev/amba-clcd-nomadik.c
+++ /dev/null
@@ -1,251 +0,0 @@
-#include <linux/amba/bus.h>
-#include <linux/amba/clcd.h>
-#include <linux/gpio/consumer.h>
-#include <linux/of.h>
-#include <linux/of_graph.h>
-#include <linux/delay.h>
-#include <linux/bitops.h>
-#include <linux/mfd/syscon.h>
-#include <linux/regmap.h>
-
-#include "amba-clcd-nomadik.h"
-
-static struct gpio_desc *grestb;
-static struct gpio_desc *scen;
-static struct gpio_desc *scl;
-static struct gpio_desc *sda;
-
-static u8 tpg110_readwrite_reg(bool write, u8 address, u8 outval)
-{
- int i;
- u8 inval = 0;
-
- /* Assert SCEN */
- gpiod_set_value_cansleep(scen, 1);
- ndelay(150);
- /* Hammer out the address */
- for (i = 5; i >= 0; i--) {
- if (address & BIT(i))
- gpiod_set_value_cansleep(sda, 1);
- else
- gpiod_set_value_cansleep(sda, 0);
- ndelay(150);
- /* Send an SCL pulse */
- gpiod_set_value_cansleep(scl, 1);
- ndelay(160);
- gpiod_set_value_cansleep(scl, 0);
- ndelay(160);
- }
-
- if (write) {
- /* WRITE */
- gpiod_set_value_cansleep(sda, 0);
- } else {
- /* READ */
- gpiod_set_value_cansleep(sda, 1);
- }
- ndelay(150);
- /* Send an SCL pulse */
- gpiod_set_value_cansleep(scl, 1);
- ndelay(160);
- gpiod_set_value_cansleep(scl, 0);
- ndelay(160);
-
- if (!write)
- /* HiZ turn-around cycle */
- gpiod_direction_input(sda);
- ndelay(150);
- /* Send an SCL pulse */
- gpiod_set_value_cansleep(scl, 1);
- ndelay(160);
- gpiod_set_value_cansleep(scl, 0);
- ndelay(160);
-
- /* Hammer in/out the data */
- for (i = 7; i >= 0; i--) {
- int value;
-
- if (write) {
- value = !!(outval & BIT(i));
- gpiod_set_value_cansleep(sda, value);
- } else {
- value = gpiod_get_value(sda);
- if (value)
- inval |= BIT(i);
- }
- ndelay(150);
- /* Send an SCL pulse */
- gpiod_set_value_cansleep(scl, 1);
- ndelay(160);
- gpiod_set_value_cansleep(scl, 0);
- ndelay(160);
- }
-
- gpiod_direction_output(sda, 0);
- /* Deassert SCEN */
- gpiod_set_value_cansleep(scen, 0);
- /* Satisfies SCEN pulse width */
- udelay(1);
-
- return inval;
-}
-
-static u8 tpg110_read_reg(u8 address)
-{
- return tpg110_readwrite_reg(false, address, 0);
-}
-
-static void tpg110_write_reg(u8 address, u8 outval)
-{
- tpg110_readwrite_reg(true, address, outval);
-}
-
-static void tpg110_startup(struct device *dev)
-{
- u8 val;
-
- dev_info(dev, "TPG110 display enable\n");
- /* De-assert the reset signal */
- gpiod_set_value_cansleep(grestb, 0);
- mdelay(1);
- dev_info(dev, "de-asserted GRESTB\n");
-
- /* Test display communication */
- tpg110_write_reg(0x00, 0x55);
- val = tpg110_read_reg(0x00);
- if (val == 0x55)
- dev_info(dev, "passed communication test\n");
- val = tpg110_read_reg(0x01);
- dev_info(dev, "TPG110 chip ID: %d version: %d\n",
- val>>4, val&0x0f);
-
- /* Show display resolution */
- val = tpg110_read_reg(0x02);
- val &= 7;
- switch (val) {
- case 0x0:
- dev_info(dev, "IN 400x240 RGB -> OUT 800x480 RGB (dual scan)");
- break;
- case 0x1:
- dev_info(dev, "IN 480x272 RGB -> OUT 800x480 RGB (dual scan)");
- break;
- case 0x4:
- dev_info(dev, "480x640 RGB");
- break;
- case 0x5:
- dev_info(dev, "480x272 RGB");
- break;
- case 0x6:
- dev_info(dev, "640x480 RGB");
- break;
- case 0x7:
- dev_info(dev, "800x480 RGB");
- break;
- default:
- dev_info(dev, "ILLEGAL RESOLUTION");
- break;
- }
-
- val = tpg110_read_reg(0x03);
- dev_info(dev, "resolution is controlled by %s\n",
- (val & BIT(7)) ? "software" : "hardware");
-}
-
-static void tpg110_enable(struct clcd_fb *fb)
-{
- struct device *dev = &fb->dev->dev;
- static bool startup;
- u8 val;
-
- if (!startup) {
- tpg110_startup(dev);
- startup = true;
- }
-
- /* Take chip out of standby */
- val = tpg110_read_reg(0x03);
- val |= BIT(0);
- tpg110_write_reg(0x03, val);
-}
-
-static void tpg110_disable(struct clcd_fb *fb)
-{
- u8 val;
-
- dev_info(&fb->dev->dev, "TPG110 display disable\n");
- val = tpg110_read_reg(0x03);
- /* Put into standby */
- val &= ~BIT(0);
- tpg110_write_reg(0x03, val);
-}
-
-static void tpg110_init(struct device *dev, struct device_node *np,
- struct clcd_board *board)
-{
- dev_info(dev, "TPG110 display init\n");
-
- /* This asserts the GRESTB signal, putting the display into reset */
- grestb = devm_fwnode_get_gpiod_from_child(dev, "grestb", &np->fwnode,
- GPIOD_OUT_HIGH, "grestb");
- if (IS_ERR(grestb)) {
- dev_err(dev, "no GRESTB GPIO\n");
- return;
- }
- scen = devm_fwnode_get_gpiod_from_child(dev, "scen", &np->fwnode,
- GPIOD_OUT_LOW, "scen");
- if (IS_ERR(scen)) {
- dev_err(dev, "no SCEN GPIO\n");
- return;
- }
- scl = devm_fwnode_get_gpiod_from_child(dev, "scl", &np->fwnode,
- GPIOD_OUT_LOW, "scl");
- if (IS_ERR(scl)) {
- dev_err(dev, "no SCL GPIO\n");
- return;
- }
- sda = devm_fwnode_get_gpiod_from_child(dev, "sda", &np->fwnode,
- GPIOD_OUT_LOW, "sda");
- if (IS_ERR(sda)) {
- dev_err(dev, "no SDA GPIO\n");
- return;
- }
- board->enable = tpg110_enable;
- board->disable = tpg110_disable;
-}
-
-int nomadik_clcd_init_panel(struct clcd_fb *fb, struct device_node *panel)
-{
- if (of_device_is_compatible(panel, "tpo,tpg110"))
- tpg110_init(&fb->dev->dev, panel, fb->board);
- else
- dev_info(&fb->dev->dev, "unknown panel\n");
-
- /* Unknown panel, fall through */
- return 0;
-}
-EXPORT_SYMBOL_GPL(nomadik_clcd_init_panel);
-
-#define PMU_CTRL_OFFSET 0x0000
-#define PMU_CTRL_LCDNDIF BIT(26)
-
-int nomadik_clcd_init_board(struct amba_device *adev,
- struct clcd_board *board)
-{
- struct regmap *pmu_regmap;
-
- dev_info(&adev->dev, "Nomadik CLCD board init\n");
- pmu_regmap =
- syscon_regmap_lookup_by_compatible("stericsson,nomadik-pmu");
- if (IS_ERR(pmu_regmap)) {
- dev_err(&adev->dev, "could not find PMU syscon regmap\n");
- return PTR_ERR(pmu_regmap);
- }
- regmap_update_bits(pmu_regmap,
- PMU_CTRL_OFFSET,
- PMU_CTRL_LCDNDIF,
- 0);
- dev_info(&adev->dev, "set PMU mux to CLCD mode\n");
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(nomadik_clcd_init_board);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-17 10:35:17 +0000