diff options
Diffstat (limited to 'drivers/video/fbdev/amba-clcd-nomadik.c')
| -rw-r--r-- | drivers/video/fbdev/amba-clcd-nomadik.c | 251 |
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); |