Initial revision

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, &reg16);
+	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, &reg8);
+	/* 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, &reg8);
+	/* 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, &reg32);
+	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, &reg16);
+	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 */