leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

gpu: host1x: mipi: Parameterize to support future SoCs

Browse Source 
Parameterize more of the register programming to accomodate for changes
required by future SoC generations.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2015-04-08 17:03:49 +02:00
parent d770e558e2
commit 83a3c223cc
1 changed files with 79 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

85
drivers/gpu/host1x/mipi.c
View File

@ -31,6 +31,9 @@
#include "dev.h"
#define MIPI_CAL_CTRL 0x00
#define MIPI_CAL_CTRL_NOISE_FILTER(x) (((x) & 0xf) << 26)
#define MIPI_CAL_CTRL_PRESCALE(x) (((x) & 0x3) << 24)
#define MIPI_CAL_CTRL_CLKEN_OVR (1 << 4)
#define MIPI_CAL_CTRL_START (1 << 0)
#define MIPI_CAL_AUTOCAL_CTRL 0x01
@ -73,8 +76,11 @@
#define MIPI_CAL_BIAS_PAD_CFG1 0x17
#define MIPI_CAL_BIAS_PAD_DRV_DN_REF(x) (((x) & 0x7) << 16)
#define MIPI_CAL_BIAS_PAD_DRV_UP_REF(x) (((x) & 0x7) << 8)
#define MIPI_CAL_BIAS_PAD_CFG2 0x18
#define MIPI_CAL_BIAS_PAD_VCLAMP(x) (((x) & 0x7) << 16)
#define MIPI_CAL_BIAS_PAD_VAUXP(x) (((x) & 0x7) << 4)
#define MIPI_CAL_BIAS_PAD_PDVREG (1 << 1)
struct tegra_mipi_pad {
@ -86,6 +92,25 @@ struct tegra_mipi_soc {
bool has_clk_lane;
const struct tegra_mipi_pad *pads;
unsigned int num_pads;
bool clock_enable_override;
bool needs_vclamp_ref;
/* bias pad configuration settings */
u8 pad_drive_down_ref;
u8 pad_drive_up_ref;
u8 pad_vclamp_level;
u8 pad_vauxp_level;
/* calibration settings for data lanes */
u8 hspdos;
u8 hspuos;
u8 termos;
/* calibration settings for clock lanes */
u8 hsclkpdos;
u8 hsclkpuos;
};
struct tegra_mipi {
@ -201,27 +226,38 @@ int tegra_mipi_calibrate(struct tegra_mipi_device *device)
value = tegra_mipi_readl(device->mipi, MIPI_CAL_BIAS_PAD_CFG0);
value &= ~MIPI_CAL_BIAS_PAD_PDVCLAMP;
if (soc->needs_vclamp_ref)
value |= MIPI_CAL_BIAS_PAD_E_VCLAMP_REF;
tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG0);
tegra_mipi_writel(device->mipi, MIPI_CAL_BIAS_PAD_DRV_DN_REF(2),
MIPI_CAL_BIAS_PAD_CFG1);
value = MIPI_CAL_BIAS_PAD_DRV_DN_REF(soc->pad_drive_down_ref) |
MIPI_CAL_BIAS_PAD_DRV_UP_REF(soc->pad_drive_up_ref);
tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG1);
value = tegra_mipi_readl(device->mipi, MIPI_CAL_BIAS_PAD_CFG2);
value &= ~MIPI_CAL_BIAS_PAD_PDVREG;
tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG2);
value = tegra_mipi_readl(device->mipi, MIPI_CAL_BIAS_PAD_CFG2);
value &= ~MIPI_CAL_BIAS_PAD_VCLAMP(0x7);
value &= ~MIPI_CAL_BIAS_PAD_VAUXP(0x7);
value |= MIPI_CAL_BIAS_PAD_VCLAMP(soc->pad_vclamp_level);
value |= MIPI_CAL_BIAS_PAD_VAUXP(soc->pad_vauxp_level);
tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG2);
for (i = 0; i < soc->num_pads; i++) {
u32 clk = 0, data = 0;
if (device->pads & BIT(i)) {
data = MIPI_CAL_CONFIG_SELECT |
MIPI_CAL_CONFIG_HSPDOS(0) |
MIPI_CAL_CONFIG_HSPUOS(4) |
MIPI_CAL_CONFIG_TERMOS(5);
MIPI_CAL_CONFIG_HSPDOS(soc->hspdos) |
MIPI_CAL_CONFIG_HSPUOS(soc->hspuos) |
MIPI_CAL_CONFIG_TERMOS(soc->termos);
clk = MIPI_CAL_CONFIG_SELECT |
MIPI_CAL_CONFIG_HSCLKPDOSD(0) |
MIPI_CAL_CONFIG_HSCLKPUOSD(4);
MIPI_CAL_CONFIG_HSCLKPDOSD(soc->hsclkpdos) |
MIPI_CAL_CONFIG_HSCLKPUOSD(soc->hsclkpuos);
}
tegra_mipi_writel(device->mipi, data, soc->pads[i].data);
@ -230,6 +266,19 @@ int tegra_mipi_calibrate(struct tegra_mipi_device *device)
tegra_mipi_writel(device->mipi, clk, soc->pads[i].clk);
}
value = tegra_mipi_readl(device->mipi, MIPI_CAL_CTRL);
value &= ~MIPI_CAL_CTRL_NOISE_FILTER(0xf);
value &= ~MIPI_CAL_CTRL_PRESCALE(0x3);
value |= MIPI_CAL_CTRL_NOISE_FILTER(0xa);
value |= MIPI_CAL_CTRL_PRESCALE(0x2);
if (!soc->clock_enable_override)
value &= ~MIPI_CAL_CTRL_CLKEN_OVR;
else
value |= MIPI_CAL_CTRL_CLKEN_OVR;
tegra_mipi_writel(device->mipi, value, MIPI_CAL_CTRL);
value = tegra_mipi_readl(device->mipi, MIPI_CAL_CTRL);
value |= MIPI_CAL_CTRL_START;
tegra_mipi_writel(device->mipi, value, MIPI_CAL_CTRL);
@ -259,6 +308,17 @@ static const struct tegra_mipi_soc tegra114_mipi_soc = {
.has_clk_lane = false,
.pads = tegra114_mipi_pads,
.num_pads = ARRAY_SIZE(tegra114_mipi_pads),
.clock_enable_override = true,
.needs_vclamp_ref = true,
.pad_drive_down_ref = 0x2,
.pad_drive_up_ref = 0x0,
.pad_vclamp_level = 0x0,
.pad_vauxp_level = 0x0,
.hspdos = 0x0,
.hspuos = 0x4,
.termos = 0x5,
.hsclkpdos = 0x0,
.hsclkpuos = 0x4,
};
static const struct tegra_mipi_pad tegra124_mipi_pads[] = {
@ -275,6 +335,17 @@ static const struct tegra_mipi_soc tegra124_mipi_soc = {
.has_clk_lane = true,
.pads = tegra124_mipi_pads,
.num_pads = ARRAY_SIZE(tegra124_mipi_pads),
.clock_enable_override = true,
.needs_vclamp_ref = true,
.pad_drive_down_ref = 0x2,
.pad_drive_up_ref = 0x0,
.pad_vclamp_level = 0x0,
.pad_vauxp_level = 0x0,
.hspdos = 0x0,
.hspuos = 0x0,
.termos = 0x0,
.hsclkpdos = 0x1,
.hsclkpuos = 0x2,
};
static struct of_device_id tegra_mipi_of_match[] = {