diff options
Diffstat (limited to 'u-boot/drivers/video/sm501.c')
| -rw-r--r-- | u-boot/drivers/video/sm501.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/u-boot/drivers/video/sm501.c b/u-boot/drivers/video/sm501.c new file mode 100644 index 0000000..6a1e010 --- /dev/null +++ b/u-boot/drivers/video/sm501.c @@ -0,0 +1,240 @@ +/* + * (C) Copyright 2002 + * Stäubli Faverges - <www.staubli.com> + * Pierre AUBERT p.aubert@staubli.com + * + * (C) Copyright 2005 + * Martin Krause TQ-Systems GmbH martin.krause@tqs.de + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* + * Basic video support for SMI SM501 "Voyager" graphic controller + */ + +#include <common.h> + +#include <asm/io.h> +#include <video_fb.h> +#include <sm501.h> + +#define read8(ptrReg) \ + *(volatile unsigned char *)(sm501.isaBase + ptrReg) + +#define write8(ptrReg,value) \ + *(volatile unsigned char *)(sm501.isaBase + ptrReg) = value + +#define read16(ptrReg) \ + (*(volatile unsigned short *)(sm501.isaBase + ptrReg)) + +#define write16(ptrReg,value) \ + (*(volatile unsigned short *)(sm501.isaBase + ptrReg) = value) + +#define read32(ptrReg) \ + (*(volatile unsigned int *)(sm501.isaBase + ptrReg)) + +#define write32(ptrReg, value) \ + (*(volatile unsigned int *)(sm501.isaBase + ptrReg) = value) + +GraphicDevice sm501; + +void write_be32(int off, unsigned int val) +{ + out_be32((unsigned __iomem *)(sm501.isaBase + off), val); +} + +void write_le32(int off, unsigned int val) +{ + out_le32((unsigned __iomem *)(sm501.isaBase + off), val); +} + +void (*write_reg32)(int off, unsigned int val) = write_be32; + +/*----------------------------------------------------------------------------- + * SmiSetRegs -- + *----------------------------------------------------------------------------- + */ +static void SmiSetRegs (void) +{ + /* + * The content of the chipset register depends on the board (clocks, + * ...) + */ + const SMI_REGS *preg = board_get_regs (); + while (preg->Index) { + write_reg32 (preg->Index, preg->Value); + /* + * Insert a delay between + */ + udelay (1000); + preg ++; + } +} + +#ifdef CONFIG_VIDEO_SM501_PCI +static struct pci_device_id sm501_pci_tbl[] = { + { PCI_VENDOR_ID_SMI, PCI_DEVICE_ID_SMI_501 }, + {} +}; +#endif + +/* + * We do not enforce board code to provide empty/unused + * functions for this driver and define weak default + * functions here. + */ +unsigned int __board_video_init (void) +{ + return 0; +} + +unsigned int board_video_init (void) + __attribute__((weak, alias("__board_video_init"))); + +unsigned int __board_video_get_fb (void) +{ + return 0; +} + +unsigned int board_video_get_fb (void) + __attribute__((weak, alias("__board_video_get_fb"))); + +void __board_validate_screen (unsigned int base) +{ +} + +void board_validate_screen (unsigned int base) + __attribute__((weak, alias("__board_validate_screen"))); + +/*----------------------------------------------------------------------------- + * video_hw_init -- + *----------------------------------------------------------------------------- + */ +void *video_hw_init (void) +{ +#ifdef CONFIG_VIDEO_SM501_PCI + unsigned int pci_mem_base, pci_mmio_base; + unsigned int id; + unsigned short device_id; + pci_dev_t devbusfn; + int mem; +#endif + unsigned int *vm, i; + + memset (&sm501, 0, sizeof (GraphicDevice)); + +#ifdef CONFIG_VIDEO_SM501_PCI + printf("Video: "); + + /* Look for SM501/SM502 chips */ + devbusfn = pci_find_devices(sm501_pci_tbl, 0); + if (devbusfn < 0) { + printf ("PCI Controller not found.\n"); + goto not_pci; + } + + /* Setup */ + pci_write_config_dword (devbusfn, PCI_COMMAND, + (PCI_COMMAND_MEMORY | PCI_COMMAND_IO)); + pci_read_config_word (devbusfn, PCI_DEVICE_ID, &device_id); + pci_read_config_dword (devbusfn, PCI_REVISION_ID, &id); + pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_0, &pci_mem_base); + pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_1, &pci_mmio_base); + sm501.frameAdrs = pci_mem_to_phys (devbusfn, pci_mem_base); + sm501.isaBase = pci_mem_to_phys (devbusfn, pci_mmio_base); + + if (sm501.isaBase) + write_reg32 = write_le32; + + mem = in_le32 ((unsigned __iomem *)(sm501.isaBase + 0x10)); + mem = (mem & 0x0000e000) >> 13; + switch (mem) { + case 1: + mem = 8; + break; + case 2: + mem = 16; + break; + case 3: + mem = 32; + break; + case 4: + mem = 64; + break; + case 5: + mem = 2; + break; + case 0: + default: + mem = 4; + } + printf ("PCI SM50%d %d MB\n", ((id & 0xff) == 0xC0) ? 2 : 1, mem); +not_pci: +#endif + /* + * Initialization of the access to the graphic chipset Retreive base + * address of the chipset (see board/RPXClassic/eccx.c) + */ + if (!sm501.isaBase) { + sm501.isaBase = board_video_init (); + if (!sm501.isaBase) + return NULL; + } + + if (!sm501.frameAdrs) { + sm501.frameAdrs = board_video_get_fb (); + if (!sm501.frameAdrs) + return NULL; + } + + sm501.winSizeX = board_get_width (); + sm501.winSizeY = board_get_height (); + +#if defined(CONFIG_VIDEO_SM501_8BPP) + sm501.gdfIndex = GDF__8BIT_INDEX; + sm501.gdfBytesPP = 1; + +#elif defined(CONFIG_VIDEO_SM501_16BPP) + sm501.gdfIndex = GDF_16BIT_565RGB; + sm501.gdfBytesPP = 2; + +#elif defined(CONFIG_VIDEO_SM501_32BPP) + sm501.gdfIndex = GDF_32BIT_X888RGB; + sm501.gdfBytesPP = 4; +#else +#error Unsupported SM501 BPP +#endif + + sm501.memSize = sm501.winSizeX * sm501.winSizeY * sm501.gdfBytesPP; + + /* Load Smi registers */ + SmiSetRegs (); + + /* (see board/RPXClassic/RPXClassic.c) */ + board_validate_screen (sm501.isaBase); + + /* Clear video memory */ + i = sm501.memSize/4; + vm = (unsigned int *)sm501.frameAdrs; + while(i--) + *vm++ = 0; + + return (&sm501); +} |