diff options
Diffstat (limited to 'drivers/w83c553f.c')
| -rw-r--r-- | drivers/w83c553f.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/drivers/w83c553f.c b/drivers/w83c553f.c new file mode 100644 index 0000000..5d82ed4 --- /dev/null +++ b/drivers/w83c553f.c @@ -0,0 +1,226 @@ +/* + * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Andreas Heppel <aheppel@sysgo.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 + */ + +/* + * Initialisation of the PCI-to-ISA bridge and disabling the BIOS + * write protection (for flash) in function 0 of the chip. + * Enabling function 1 (IDE controller of the chip. + */ + +#include <common.h> +#include <config.h> + +#ifdef CFG_WINBOND_83C553 + +#include <asm/io.h> +#include <pci.h> + +#include <w83c553f.h> + +#define out8(addr,val) do { \ + out_8((u8*) (addr),(val)); udelay(1); \ + } while (0) +#define out16(addr,val) do { \ + out_be16((u16*) (addr),(val)); udelay(1); \ + } while (0) + +extern uint ide_bus_offset[CFG_IDE_MAXBUS]; + +void initialise_pic(void); +void initialise_dma(void); + +void initialise_w83c553f(void) +{ + pci_dev_t devbusfn; + unsigned char reg8; + unsigned short reg16; + unsigned int reg32; + + devbusfn = pci_find_device(W83C553F_VID, W83C553F_DID, 0); + if (devbusfn == -1) + { + printf("Error: Cannot find W83C553F controller on any PCI bus."); + return; + } + + pci_read_config_word(devbusfn, PCI_COMMAND, ®16); + reg16 |= PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY; + pci_write_config_word(devbusfn, PCI_COMMAND, reg16); + + pci_read_config_byte(devbusfn, WINBOND_IPADCR, ®8); + /* 16 MB ISA memory space */ + reg8 |= (IPADCR_IPATOM4 | IPADCR_IPATOM5 | IPADCR_IPATOM6 | IPADCR_IPATOM7); + reg8 &= ~IPADCR_MBE512; + pci_write_config_byte(devbusfn, WINBOND_IPADCR, reg8); + + pci_read_config_byte(devbusfn, WINBOND_CSCR, ®8); + /* switch off BIOS write protection */ + reg8 |= CSCR_UBIOSCSE; + reg8 &= ~CSCR_BIOSWP; + pci_write_config_byte(devbusfn, WINBOND_CSCR, reg8); + + /* + * Interrupt routing: + * - IDE -> IRQ 9/0 + * - INTA -> IRQ 10 + * - INTB -> IRQ 11 + * - INTC -> IRQ 14 + * - INTD -> IRQ 15 + */ + pci_write_config_byte(devbusfn, WINBOND_IDEIRCR, 0x90); + pci_write_config_word(devbusfn, WINBOND_PCIIRCR, 0xABEF); + + /* + * Read IDE bus offsets from function 1 device. + * We must unmask the LSB indicating that ist is an IO address. + */ + devbusfn |= PCI_BDF(0,0,1); + + /* + * Switch off legacy IRQ for IDE and IDE port 1. + */ + pci_write_config_byte(devbusfn, 0x09, 0x8F); + + pci_read_config_dword(devbusfn, WINDOND_IDECSR, ®32); + reg32 &= ~(IDECSR_LEGIRQ | IDECSR_P1EN | IDECSR_P1F16); + pci_write_config_dword(devbusfn, WINDOND_IDECSR, reg32); + + pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_0, &ide_bus_offset[0]); + ide_bus_offset[0] &= ~1; +#if CFG_IDE_MAXBUS > 1 + pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_2, &ide_bus_offset[1]); + ide_bus_offset[1] &= ~1; +#endif + + /* + * Enable function 1, IDE -> busmastering and IO space access + */ + pci_read_config_word(devbusfn, PCI_COMMAND, ®16); + reg16 |= PCI_COMMAND_MASTER | PCI_COMMAND_IO; + pci_write_config_word(devbusfn, PCI_COMMAND, reg16); + + /* + * Initialise ISA interrupt controller + */ + initialise_pic(); + + /* + * Initialise DMA controller + */ + initialise_dma(); +} + +void initialise_pic(void) +{ + out8(W83C553F_PIC1_ICW1, 0x11); + out8(W83C553F_PIC1_ICW2, 0x08); + out8(W83C553F_PIC1_ICW3, 0x04); + out8(W83C553F_PIC1_ICW4, 0x01); + out8(W83C553F_PIC1_OCW1, 0xfb); + out8(W83C553F_PIC1_ELC, 0x20); + + out8(W83C553F_PIC2_ICW1, 0x11); + out8(W83C553F_PIC2_ICW2, 0x08); + out8(W83C553F_PIC2_ICW3, 0x02); + out8(W83C553F_PIC2_ICW4, 0x01); + out8(W83C553F_PIC2_OCW1, 0xff); + out8(W83C553F_PIC2_ELC, 0xce); + + out8(W83C553F_TMR1_CMOD, 0x74); + + out8(W83C553F_PIC2_OCW1, 0x20); + out8(W83C553F_PIC1_OCW1, 0x20); + + out8(W83C553F_PIC2_OCW1, 0x2b); + out8(W83C553F_PIC1_OCW1, 0x2b); +} + +void initialise_dma(void) +{ + unsigned int channel; + unsigned int rvalue1, rvalue2; + + /* perform a H/W reset of the devices */ + + out8(W83C553F_DMA1 + W83C553F_DMA1_MC, 0x00); + out16(W83C553F_DMA2 + W83C553F_DMA2_MC, 0x0000); + + /* initialise all channels to a sane state */ + + for (channel = 0; channel < 4; channel++) { + /* + * dependent upon the channel, setup the specifics: + * + * demand + * address-increment + * autoinitialize-disable + * verify-transfer + */ + + switch (channel) { + case 0: + rvalue1 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH0SEL|W83C553F_MODE_TT_VERIFY); + rvalue2 = (W83C553F_MODE_TM_CASCADE|W83C553F_MODE_CH0SEL); + break; + case 1: + rvalue1 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH1SEL|W83C553F_MODE_TT_VERIFY); + rvalue2 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH1SEL|W83C553F_MODE_TT_VERIFY); + break; + case 2: + rvalue1 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH2SEL|W83C553F_MODE_TT_VERIFY); + rvalue2 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH2SEL|W83C553F_MODE_TT_VERIFY); + break; + case 3: + rvalue1 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH3SEL|W83C553F_MODE_TT_VERIFY); + rvalue2 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH3SEL|W83C553F_MODE_TT_VERIFY); + break; + default: + rvalue1 = 0x00; + rvalue2 = 0x00; + break; + } + + /* write to write mode registers */ + + out8(W83C553F_DMA1 + W83C553F_DMA1_WM, rvalue1 & 0xFF); + out16(W83C553F_DMA2 + W83C553F_DMA2_WM, rvalue2 & 0x00FF); + } + + /* enable all channels */ + + out8(W83C553F_DMA1 + W83C553F_DMA1_CM, 0x00); + out16(W83C553F_DMA2 + W83C553F_DMA2_CM, 0x0000); + /* + * initialize the global DMA configuration + * + * DACK# active low + * DREQ active high + * fixed priority + * channel group enable + */ + + out8(W83C553F_DMA1 + W83C553F_DMA1_CS, 0x00); + out16(W83C553F_DMA2 + W83C553F_DMA2_CS, 0x0000); +} + +#endif /* CFG_WINBOND_83C553 */ |