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![Anatolij Gustschin](/assets/img/avatar_default.png)
For boards using sm501/sm502 on PCI bus some driver functions normaly defined in the board code are not needed and empty. Provide weak default functions for them and do not enforce board code to define empty functions. Signed-off-by: Anatolij Gustschin <agust@denx.de>
241 lines
5.7 KiB
C
241 lines
5.7 KiB
C
/*
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* (C) Copyright 2002
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* Stäubli Faverges - <www.staubli.com>
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* Pierre AUBERT p.aubert@staubli.com
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*
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* (C) Copyright 2005
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* Martin Krause TQ-Systems GmbH martin.krause@tqs.de
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* Basic video support for SMI SM501 "Voyager" graphic controller
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <video_fb.h>
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#include <sm501.h>
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#define read8(ptrReg) \
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*(volatile unsigned char *)(sm501.isaBase + ptrReg)
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#define write8(ptrReg,value) \
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*(volatile unsigned char *)(sm501.isaBase + ptrReg) = value
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#define read16(ptrReg) \
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(*(volatile unsigned short *)(sm501.isaBase + ptrReg))
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#define write16(ptrReg,value) \
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(*(volatile unsigned short *)(sm501.isaBase + ptrReg) = value)
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#define read32(ptrReg) \
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(*(volatile unsigned int *)(sm501.isaBase + ptrReg))
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#define write32(ptrReg, value) \
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(*(volatile unsigned int *)(sm501.isaBase + ptrReg) = value)
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GraphicDevice sm501;
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void write_be32(int off, unsigned int val)
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{
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out_be32((unsigned __iomem *)(sm501.isaBase + off), val);
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}
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void write_le32(int off, unsigned int val)
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{
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out_le32((unsigned __iomem *)(sm501.isaBase + off), val);
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}
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void (*write_reg32)(int off, unsigned int val) = write_be32;
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/*-----------------------------------------------------------------------------
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* SmiSetRegs --
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*-----------------------------------------------------------------------------
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*/
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static void SmiSetRegs (void)
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{
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/*
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* The content of the chipset register depends on the board (clocks,
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* ...)
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*/
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const SMI_REGS *preg = board_get_regs ();
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while (preg->Index) {
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write_reg32 (preg->Index, preg->Value);
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/*
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* Insert a delay between
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*/
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udelay (1000);
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preg ++;
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}
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}
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#ifdef CONFIG_VIDEO_SM501_PCI
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static struct pci_device_id sm501_pci_tbl[] = {
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{ PCI_VENDOR_ID_SMI, PCI_DEVICE_ID_SMI_501 },
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{}
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};
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#endif
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/*
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* We do not enforce board code to provide empty/unused
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* functions for this driver and define weak default
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* functions here.
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*/
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unsigned int __board_video_init (void)
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{
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return 0;
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}
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unsigned int board_video_init (void)
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__attribute__((weak, alias("__board_video_init")));
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unsigned int __board_video_get_fb (void)
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{
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return 0;
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}
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unsigned int board_video_get_fb (void)
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__attribute__((weak, alias("__board_video_get_fb")));
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void __board_validate_screen (unsigned int base)
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{
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}
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void board_validate_screen (unsigned int base)
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__attribute__((weak, alias("__board_validate_screen")));
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/*-----------------------------------------------------------------------------
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* video_hw_init --
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*-----------------------------------------------------------------------------
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*/
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void *video_hw_init (void)
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{
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#ifdef CONFIG_VIDEO_SM501_PCI
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unsigned int pci_mem_base, pci_mmio_base;
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unsigned int id;
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unsigned short device_id;
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pci_dev_t devbusfn;
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int mem;
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#endif
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unsigned int *vm, i;
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memset (&sm501, 0, sizeof (GraphicDevice));
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#ifdef CONFIG_VIDEO_SM501_PCI
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printf("Video: ");
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/* Look for SM501/SM502 chips */
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devbusfn = pci_find_devices(sm501_pci_tbl, 0);
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if (devbusfn < 0) {
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printf ("PCI Controller not found.\n");
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goto not_pci;
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}
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/* Setup */
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pci_write_config_dword (devbusfn, PCI_COMMAND,
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(PCI_COMMAND_MEMORY | PCI_COMMAND_IO));
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pci_read_config_word (devbusfn, PCI_DEVICE_ID, &device_id);
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pci_read_config_dword (devbusfn, PCI_REVISION_ID, &id);
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pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_0, &pci_mem_base);
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pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_1, &pci_mmio_base);
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sm501.frameAdrs = pci_mem_to_phys (devbusfn, pci_mem_base);
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sm501.isaBase = pci_mem_to_phys (devbusfn, pci_mmio_base);
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if (sm501.isaBase)
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write_reg32 = write_le32;
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mem = in_le32 ((unsigned __iomem *)(sm501.isaBase + 0x10));
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mem = (mem & 0x0000e000) >> 13;
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switch (mem) {
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case 1:
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mem = 8;
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break;
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case 2:
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mem = 16;
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break;
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case 3:
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mem = 32;
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break;
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case 4:
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mem = 64;
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break;
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case 5:
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mem = 2;
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break;
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case 0:
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default:
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mem = 4;
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}
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printf ("PCI SM50%d %d MB\n", ((id & 0xff) == 0xC0) ? 2 : 1, mem);
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not_pci:
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#endif
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/*
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* Initialization of the access to the graphic chipset Retreive base
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* address of the chipset (see board/RPXClassic/eccx.c)
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*/
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if (!sm501.isaBase) {
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sm501.isaBase = board_video_init ();
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if (!sm501.isaBase)
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return NULL;
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}
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if (!sm501.frameAdrs) {
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sm501.frameAdrs = board_video_get_fb ();
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if (!sm501.frameAdrs)
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return NULL;
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}
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sm501.winSizeX = board_get_width ();
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sm501.winSizeY = board_get_height ();
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#if defined(CONFIG_VIDEO_SM501_8BPP)
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sm501.gdfIndex = GDF__8BIT_INDEX;
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sm501.gdfBytesPP = 1;
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#elif defined(CONFIG_VIDEO_SM501_16BPP)
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sm501.gdfIndex = GDF_16BIT_565RGB;
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sm501.gdfBytesPP = 2;
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#elif defined(CONFIG_VIDEO_SM501_32BPP)
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sm501.gdfIndex = GDF_32BIT_X888RGB;
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sm501.gdfBytesPP = 4;
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#else
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#error Unsupported SM501 BPP
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#endif
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sm501.memSize = sm501.winSizeX * sm501.winSizeY * sm501.gdfBytesPP;
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/* Load Smi registers */
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SmiSetRegs ();
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/* (see board/RPXClassic/RPXClassic.c) */
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board_validate_screen (sm501.isaBase);
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/* Clear video memory */
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i = sm501.memSize/4;
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vm = (unsigned int *)sm501.frameAdrs;
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while(i--)
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*vm++ = 0;
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return (&sm501);
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}
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