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linux/drivers/video/fbdev/bt455.h

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
/*
* linux/drivers/video/bt455.h
*
* Copyright 2003 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
video: fbdev: pmag-ba-fb: Fix and rework Bt455 colormap handling The Bt455 is a greyscale RAMDAC, using the green color palette entries only while still providing registers for the red and blue components, all the three of which have to be loaded on palette updates. Chip documentation [1] mandates that the unused red and blue registers are written with 0. Therefore update code to follow this requirement and given that it makes the red and blue components unusable remove them from internal API calls altogether. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:21 +00:00
* Copyright 2016 Maciej W. Rozycki <macro@linux-mips.org>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file COPYING in the main directory of this
* archive for more details.
*/
#include <linux/types.h>
/*
* Bt455 byte-wide registers, 32-bit aligned.
*/
struct bt455_regs {
volatile u8 addr_cmap;
u8 pad0[3];
volatile u8 addr_cmap_data;
u8 pad1[3];
volatile u8 addr_clr;
u8 pad2[3];
volatile u8 addr_ovly;
u8 pad3[3];
};
static inline void bt455_select_reg(struct bt455_regs *regs, int ir)
{
mb();
regs->addr_cmap = ir & 0x0f;
}
video: fbdev: pmag-ba-fb: Optimize Bt455 colormap addressing Use the address autoincrement feature when accessing successive palette entries and also skip loading a palette address in overlay register assesses which do not use that address. Provide a red/green/blue register sequencer reset helper for use in overlay register assesses where the state of the sequencer is not known. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:27 +00:00
static inline void bt455_reset_reg(struct bt455_regs *regs)
{
mb();
regs->addr_clr = 0;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
/*
* Read/write to a Bt455 color map register.
*/
video: fbdev: pmag-ba-fb: Optimize Bt455 colormap addressing Use the address autoincrement feature when accessing successive palette entries and also skip loading a palette address in overlay register assesses which do not use that address. Provide a red/green/blue register sequencer reset helper for use in overlay register assesses where the state of the sequencer is not known. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:27 +00:00
static inline void bt455_read_cmap_next(struct bt455_regs *regs, u8 *grey)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
{
mb();
video: fbdev: pmag-ba-fb: Fix and rework Bt455 colormap handling The Bt455 is a greyscale RAMDAC, using the green color palette entries only while still providing registers for the red and blue components, all the three of which have to be loaded on palette updates. Chip documentation [1] mandates that the unused red and blue registers are written with 0. Therefore update code to follow this requirement and given that it makes the red and blue components unusable remove them from internal API calls altogether. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:21 +00:00
regs->addr_cmap_data;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
rmb();
video: fbdev: pmag-ba-fb: Fix and rework Bt455 colormap handling The Bt455 is a greyscale RAMDAC, using the green color palette entries only while still providing registers for the red and blue components, all the three of which have to be loaded on palette updates. Chip documentation [1] mandates that the unused red and blue registers are written with 0. Therefore update code to follow this requirement and given that it makes the red and blue components unusable remove them from internal API calls altogether. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:21 +00:00
*grey = regs->addr_cmap_data & 0xf;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
rmb();
video: fbdev: pmag-ba-fb: Fix and rework Bt455 colormap handling The Bt455 is a greyscale RAMDAC, using the green color palette entries only while still providing registers for the red and blue components, all the three of which have to be loaded on palette updates. Chip documentation [1] mandates that the unused red and blue registers are written with 0. Therefore update code to follow this requirement and given that it makes the red and blue components unusable remove them from internal API calls altogether. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:21 +00:00
regs->addr_cmap_data;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
}
video: fbdev: pmag-ba-fb: Optimize Bt455 colormap addressing Use the address autoincrement feature when accessing successive palette entries and also skip loading a palette address in overlay register assesses which do not use that address. Provide a red/green/blue register sequencer reset helper for use in overlay register assesses where the state of the sequencer is not known. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:27 +00:00
static inline void bt455_write_cmap_next(struct bt455_regs *regs, u8 grey)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
{
wmb();
video: fbdev: pmag-ba-fb: Fix and rework Bt455 colormap handling The Bt455 is a greyscale RAMDAC, using the green color palette entries only while still providing registers for the red and blue components, all the three of which have to be loaded on palette updates. Chip documentation [1] mandates that the unused red and blue registers are written with 0. Therefore update code to follow this requirement and given that it makes the red and blue components unusable remove them from internal API calls altogether. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:21 +00:00
regs->addr_cmap_data = 0x0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
wmb();
video: fbdev: pmag-ba-fb: Fix and rework Bt455 colormap handling The Bt455 is a greyscale RAMDAC, using the green color palette entries only while still providing registers for the red and blue components, all the three of which have to be loaded on palette updates. Chip documentation [1] mandates that the unused red and blue registers are written with 0. Therefore update code to follow this requirement and given that it makes the red and blue components unusable remove them from internal API calls altogether. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:21 +00:00
regs->addr_cmap_data = grey & 0xf;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
wmb();
video: fbdev: pmag-ba-fb: Fix and rework Bt455 colormap handling The Bt455 is a greyscale RAMDAC, using the green color palette entries only while still providing registers for the red and blue components, all the three of which have to be loaded on palette updates. Chip documentation [1] mandates that the unused red and blue registers are written with 0. Therefore update code to follow this requirement and given that it makes the red and blue components unusable remove them from internal API calls altogether. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:21 +00:00
regs->addr_cmap_data = 0x0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
}
video: fbdev: pmag-ba-fb: Optimize Bt455 colormap addressing Use the address autoincrement feature when accessing successive palette entries and also skip loading a palette address in overlay register assesses which do not use that address. Provide a red/green/blue register sequencer reset helper for use in overlay register assesses where the state of the sequencer is not known. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:27 +00:00
static inline void bt455_write_ovly_next(struct bt455_regs *regs, u8 grey)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
{
wmb();
video: fbdev: pmag-ba-fb: Fix and rework Bt455 colormap handling The Bt455 is a greyscale RAMDAC, using the green color palette entries only while still providing registers for the red and blue components, all the three of which have to be loaded on palette updates. Chip documentation [1] mandates that the unused red and blue registers are written with 0. Therefore update code to follow this requirement and given that it makes the red and blue components unusable remove them from internal API calls altogether. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:21 +00:00
regs->addr_ovly = 0x0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
wmb();
video: fbdev: pmag-ba-fb: Fix and rework Bt455 colormap handling The Bt455 is a greyscale RAMDAC, using the green color palette entries only while still providing registers for the red and blue components, all the three of which have to be loaded on palette updates. Chip documentation [1] mandates that the unused red and blue registers are written with 0. Therefore update code to follow this requirement and given that it makes the red and blue components unusable remove them from internal API calls altogether. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:21 +00:00
regs->addr_ovly = grey & 0xf;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
wmb();
video: fbdev: pmag-ba-fb: Fix and rework Bt455 colormap handling The Bt455 is a greyscale RAMDAC, using the green color palette entries only while still providing registers for the red and blue components, all the three of which have to be loaded on palette updates. Chip documentation [1] mandates that the unused red and blue registers are written with 0. Therefore update code to follow this requirement and given that it makes the red and blue components unusable remove them from internal API calls altogether. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:21 +00:00
regs->addr_ovly = 0x0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
}
video: fbdev: pmag-ba-fb: Optimize Bt455 colormap addressing Use the address autoincrement feature when accessing successive palette entries and also skip loading a palette address in overlay register assesses which do not use that address. Provide a red/green/blue register sequencer reset helper for use in overlay register assesses where the state of the sequencer is not known. References: [1] "Bt454 Bt455 170 MHz Monolithic CMOS 16 Color Palette RAMDAC", Brooktree Corporation, Document Number: L454001, Rev. I Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2016-02-22 01:55:27 +00:00
static inline void bt455_read_cmap_entry(struct bt455_regs *regs,
int cr, u8 *grey)
{
bt455_select_reg(regs, cr);
bt455_read_cmap_next(regs, grey);
}
static inline void bt455_write_cmap_entry(struct bt455_regs *regs,
int cr, u8 grey)
{
bt455_select_reg(regs, cr);
bt455_write_cmap_next(regs, grey);
}
static inline void bt455_write_ovly_entry(struct bt455_regs *regs, u8 grey)
{
bt455_reset_reg(regs);
bt455_write_ovly_next(regs, grey);
}
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