patch-2.3.23 linux/arch/arm/kernel/dec21285.c

• Lines: 481
• Date: Wed Oct 20 16:29:08 1999
• Orig file: v2.3.22/linux/arch/arm/kernel/dec21285.c
• Orig date: Tue Aug 31 17:29:12 1999

diff -u --recursive --new-file v2.3.22/linux/arch/arm/kernel/dec21285.c linux/arch/arm/kernel/dec21285.c
@@ -13,241 +13,318 @@
 #include <linux/init.h>
 #include <linux/ioport.h>
 
+#include <asm/dec21285.h>
+#include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/system.h>
-#include <asm/hardware.h>
 
 #define MAX_SLOTS		21
 
-extern void pcibios_fixup_ebsa285(struct pci_dev *dev);
-extern void pcibios_init_ebsa285(void);
+extern int setup_arm_irq(int, struct irqaction *);
+extern void pcibios_report_device_errors(void);
+extern int (*pci_irq_fixup)(struct pci_dev *dev);
 
-int
-pcibios_present(void)
+static unsigned long
+dc21285_base_address(struct pci_dev *dev, int where)
 {
-	return 1;
+	unsigned long addr = 0;
+	unsigned int devfn = dev->devfn;
+
+	if (dev->bus->number != 0)
+		addr = PCICFG1_BASE | (dev->bus->number << 16) | (devfn << 8);
+	else if (devfn < PCI_DEVFN(MAX_SLOTS, 0))
+		addr = PCICFG0_BASE | 0xc00000 | (devfn << 8);
+
+	return addr;
 }
 
-static unsigned long
-pcibios_base_address(unsigned char bus, unsigned char dev_fn)
+static int
+dc21285_read_config_byte(struct pci_dev *dev, int where, u8 *value)
 {
-	if (bus == 0) {
-		int slot = PCI_SLOT(dev_fn);
-		
-		if (slot < MAX_SLOTS)
-			return PCICFG0_BASE + 0xc00000 +
-				(slot << 11) + (PCI_FUNC(dev_fn) << 8);
-		else
-			return 0;
-	} else
-		return PCICFG1_BASE | (bus << 16) | (dev_fn << 8);
-}
-
-int
-pcibios_read_config_byte(unsigned char bus, unsigned char dev_fn,
-			 unsigned char where, unsigned char *val)
-{
-	unsigned long addr = pcibios_base_address(bus, dev_fn);
-	unsigned char v;
-
-	if (addr)
-		__asm__("ldr%?b	%0, [%1, %2]"
-			: "=r" (v)
-			: "r" (addr), "r" (where));
+	unsigned long addr = dc21285_base_address(dev, where);
+	u8 v;
+
+	if (addr)
+		asm("ldr%?b	%0, [%1, %2]"
+			: "=r" (v) : "r" (addr), "r" (where));
 	else
 		v = 0xff;
-	*val = v;
+
+	*value = v;
+
 	return PCIBIOS_SUCCESSFUL;
 }
 
-int
-pcibios_read_config_word(unsigned char bus, unsigned char dev_fn,
-			 unsigned char where, unsigned short *val)
+static int
+dc21285_read_config_word(struct pci_dev *dev, int where, u16 *value)
 {
-	unsigned long addr = pcibios_base_address(bus, dev_fn);
-	unsigned short v;
+	unsigned long addr = dc21285_base_address(dev, where);
+	u16 v;
 
 	if (addr)
-		__asm__("ldr%?h	%0, [%1, %2]"
-			: "=r" (v)
-			: "r" (addr), "r" (where));
+		asm("ldr%?h	%0, [%1, %2]"
+			: "=r" (v) : "r" (addr), "r" (where));
 	else
 		v = 0xffff;
-	*val = v;
+
+	*value = v;
+
 	return PCIBIOS_SUCCESSFUL;
 }
 
-int
-pcibios_read_config_dword(unsigned char bus, unsigned char dev_fn,
-			  unsigned char where, unsigned int *val)
+static int
+dc21285_read_config_dword(struct pci_dev *dev, int where, u32 *value)
 {
-	unsigned long addr = pcibios_base_address(bus, dev_fn);
-	unsigned int v;
+	unsigned long addr = dc21285_base_address(dev, where);
+	u32 v;
 
 	if (addr)
-		__asm__("ldr%?	%0, [%1, %2]"
-			: "=r" (v)
-			: "r" (addr), "r" (where));
+		asm("ldr%?	%0, [%1, %2]"
+			: "=r" (v) : "r" (addr), "r" (where));
 	else
 		v = 0xffffffff;
-	*val = v;
+
+	*value = v;
+
 	return PCIBIOS_SUCCESSFUL;
 }
 
-int
-pcibios_write_config_byte(unsigned char bus, unsigned char dev_fn,
-			  unsigned char where, unsigned char val)
+static int
+dc21285_write_config_byte(struct pci_dev *dev, int where, u8 value)
 {
-	unsigned long addr = pcibios_base_address(bus, dev_fn);
+	unsigned long addr = dc21285_base_address(dev, where);
 
 	if (addr)
-		__asm__("str%?b	%0, [%1, %2]"
-			: : "r" (val), "r" (addr), "r" (where));
+		asm("str%?b	%0, [%1, %2]"
+			: : "r" (value), "r" (addr), "r" (where));
+
 	return PCIBIOS_SUCCESSFUL;
 }
 
-int
-pcibios_write_config_word(unsigned char bus, unsigned char dev_fn,
-			  unsigned char where, unsigned short val)
+static int
+dc21285_write_config_word(struct pci_dev *dev, int where, u16 value)
 {
-	unsigned long addr = pcibios_base_address(bus, dev_fn);
+	unsigned long addr = dc21285_base_address(dev, where);
 
 	if (addr)
-		__asm__("str%?h	%0, [%1, %2]"
-			: : "r" (val), "r" (addr), "r" (where));
+		asm("str%?h	%0, [%1, %2]"
+			: : "r" (value), "r" (addr), "r" (where));
+
 	return PCIBIOS_SUCCESSFUL;
 }
 
-int
-pcibios_write_config_dword(unsigned char bus, unsigned char dev_fn,
-			   unsigned char where, unsigned int val)
+static int
+dc21285_write_config_dword(struct pci_dev *dev, int where, u32 value)
 {
-	unsigned long addr = pcibios_base_address(bus, dev_fn);
+	unsigned long addr = dc21285_base_address(dev, where);
 
 	if (addr)
-		__asm__("str%?	%0, [%1, %2]"
-			: : "r" (val), "r" (addr), "r" (where));
+		asm("str%?	%0, [%1, %2]"
+			: : "r" (value), "r" (addr), "r" (where));
+
 	return PCIBIOS_SUCCESSFUL;
 }
 
-void __init pci_set_cmd(struct pci_dev *dev, unsigned short clear, unsigned short set)
+static struct pci_ops dc21285_ops = {
+	dc21285_read_config_byte,
+	dc21285_read_config_word,
+	dc21285_read_config_dword,
+	dc21285_write_config_byte,
+	dc21285_write_config_word,
+	dc21285_write_config_dword,
+};
+
+/*
+ * Warn on PCI errors.
+ */
+static void
+dc21285_error(int irq, void *dev_id, struct pt_regs *regs)
+{
+	static unsigned long next_warn;
+	unsigned long cmd       = *CSR_PCICMD & 0x0000ffff;
+	unsigned long ctrl      = (*CSR_SA110_CNTL) & 0xffffde07;
+	unsigned long irqstatus = *CSR_IRQ_RAWSTATUS;
+	int warn = time_after_eq(jiffies, next_warn);
+
+	ctrl |= SA110_CNTL_DISCARDTIMER;
+
+	if (warn) {
+		next_warn = jiffies + HZ;
+		printk(KERN_DEBUG "PCI: ");
+	}
+
+	if (irqstatus & (1 << 31)) {
+		if (warn)
+			printk("parity error ");
+		cmd |= 1 << 31;
+	}
+
+	if (irqstatus & (1 << 30)) {
+		if (warn)
+			printk("target abort ");
+		cmd |= 1 << 28;
+	}
+
+	if (irqstatus & (1 << 29)) {
+		if (warn)
+			printk("master abort ");
+		cmd |= 1 << 29;
+	}
+
+	if (irqstatus & (1 << 28)) {
+		if (warn)
+			printk("data parity error ");
+		cmd |= 1 << 24;
+	}
+
+	if (irqstatus & (1 << 27)) {
+		if (warn)
+			printk("discard timer expired ");
+		ctrl &= ~SA110_CNTL_DISCARDTIMER;
+	}
+
+	if (irqstatus & (1 << 23)) {
+		if (warn)
+			printk("system error ");
+		ctrl |= SA110_CNTL_RXSERR;
+	}
+
+	if (warn)
+		printk("pc=[<%08lX>]\n", instruction_pointer(regs));
+
+	pcibios_report_device_errors();
+
+	*CSR_PCICMD = cmd;
+	*CSR_SA110_CNTL = ctrl;
+}
+
+static struct irqaction dc21285_error_action = {
+	dc21285_error, SA_INTERRUPT, 0, "PCI error", NULL, NULL
+};
+
+static int irqmap_ebsa[] __initdata = { IRQ_IN1, IRQ_IN0, IRQ_PCI, IRQ_IN3 };
+
+static int __init ebsa_irqval(struct pci_dev *dev)
 {
-	unsigned short cmd;
+	u8 pin;
+
+	pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
 
-	pci_read_config_word(dev, PCI_COMMAND, &cmd);
-	cmd = (cmd & ~clear) | set;
-	pci_write_config_word(dev, PCI_COMMAND, cmd);
+	return irqmap_ebsa[(PCI_SLOT(dev->devfn) + pin) & 3];
 }
 
-void __init pci_set_base_addr(struct pci_dev *dev, int idx, unsigned int addr)
+static int irqmap_cats[] __initdata = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 };
+
+static int __init cats_irqval(struct pci_dev *dev)
 {
-	int reg = PCI_BASE_ADDRESS_0 + (idx << 2);
+	if (dev->irq >= 128)
+		return 16 + (dev->irq & 0x1f);
 
-	pci_write_config_dword(dev, reg, addr);
-	pci_read_config_dword(dev, reg, &addr);
+	switch (dev->irq) {
+	case 1 ... 4:
+		return irqmap_cats[dev->irq - 1];
 
-	dev->base_address[idx] = addr;
+	default:
+		printk("PCI: device %02x:%02x has unknown irq line %x\n",
+		       dev->bus->number, dev->devfn, dev->irq);
+	case 0:
+		break;
+	}
+	return 0;
 }
 
-void __init pcibios_fixup(void)
+static int __init netwinder_irqval(struct pci_dev *dev)
 {
-	struct pci_dev *dev;
+#define DEV(v,d) ((v)<<16|(d))
+	switch (DEV(dev->vendor, dev->device)) {
+	case DEV(PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21142):
+		return IRQ_NETWINDER_ETHER100;
+
+	case DEV(PCI_VENDOR_ID_WINBOND2, 0x5a5a):
+		return IRQ_NETWINDER_ETHER10;
 
-	for (dev = pci_devices; dev; dev = dev->next) {
-		pcibios_fixup_ebsa285(dev);
+	case DEV(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_83C553):
+		return 0;
 
-		pcibios_write_config_byte(dev->bus->number, dev->devfn,
-					  PCI_INTERRUPT_LINE, dev->irq);
+	case DEV(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105):
+		return IRQ_ISA_HARDDISK1;
 
-		printk(KERN_DEBUG
-		       "PCI: %02x:%02x [%04x/%04x] on irq %d\n",
+	case DEV(PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_2000):
+		return IRQ_NETWINDER_VGA;
+
+	default:
+		printk(KERN_ERR "PCI: %02X:%02X [%04X:%04X] unknown device\n",
 			dev->bus->number, dev->devfn,
-			dev->vendor, dev->device, dev->irq);
+			dev->vendor, dev->device);
+		return 0;
 	}
-
-	hw_init();
 }
 
-void __init pcibios_init(void)
+struct pci_ops * __init dc21285_init(int pass)
 {
-	unsigned int mem_size = (unsigned int)high_memory - PAGE_OFFSET;
+	unsigned int mem_size;
 	unsigned long cntl;
 
-	*CSR_SDRAMBASEMASK    = (mem_size - 1) & 0x0ffc0000;
-	*CSR_SDRAMBASEOFFSET  = 0;
-	*CSR_ROMBASEMASK      = 0x80000000;
-	*CSR_CSRBASEMASK      = 0;
-	*CSR_CSRBASEOFFSET    = 0;
-	*CSR_PCIADDR_EXTN     = 0;
+	if (pass == 0) {
+		mem_size = (unsigned int)high_memory - PAGE_OFFSET;
+		*CSR_SDRAMBASEMASK    = (mem_size - 1) & 0x0ffc0000;
+		*CSR_SDRAMBASEOFFSET  = 0;
+		*CSR_ROMBASEMASK      = 0x80000000;
+		*CSR_CSRBASEMASK      = 0;
+		*CSR_CSRBASEOFFSET    = 0;
+		*CSR_PCIADDR_EXTN     = 0;
 
 #ifdef CONFIG_HOST_FOOTBRIDGE
-	/*
-	 * Against my better judgement, Philip Blundell still seems
-	 * to be saying that we should initialise the PCI stuff here
-	 * when the PCI_CFN bit is not set, dispite my comment below,
-	 * which he decided to remove.  If it is not set, then
-	 * the card is in add-in mode, and we're in a machine where
-	 * the bus is set up by 'others'.
-	 *
-	 * We should therefore not mess about with the mapping in
-	 * anyway, and we should not be using the virt_to_bus functions
-	 * that exist in the HOST architecture mode (since they assume
-	 * a fixed mapping).
-	 *
-	 * Instead, you should be using ADDIN mode, which allows for
-	 * this situation.  This does assume that you have correctly
-	 * initialised the PCI bus, which you must have done to get
-	 * your PC booted.
-	 *
-	 * Unfortunately, he seems to be blind to this.  I guess he'll
-	 * also remove all this.
-	 *
-	 * And THIS COMMENT STAYS, even if this gets patched, thank
-	 * you.
-	 */
-
-	/*
-	 * Map our SDRAM at a known address in PCI space, just in case
-	 * the firmware had other ideas.  Using a nonzero base is
-	 * necessary, since some VGA cards forcefully use PCI addresses
-	 * in the range 0x000a0000 to 0x000c0000. (eg, S3 cards).
-	 *
-	 * NOTE! If you need to chec the PCI_CFN bit in the SA110
-	 * control register then you've configured the kernel wrong.
-	 * If you're not using host mode, then DO NOT set
-	 * CONFIG_HOST_FOOTBRIDGE, but use CONFIG_ADDIN_FOOTBRIDGE
-	 * instead.  In this case, you MUST supply some firmware
-	 * to allow your PC to boot, plus we should not modify the
-	 * mappings that the PC BIOS has set up for us.
-	 */
-	*CSR_PCICACHELINESIZE = 0x00002008;
-	*CSR_PCICSRBASE       = 0;
-	*CSR_PCICSRIOBASE     = 0;
-	*CSR_PCISDRAMBASE     = virt_to_bus((void *)PAGE_OFFSET);
-	*CSR_PCIROMBASE       = 0;
-	*CSR_PCICMD           = PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
-				PCI_COMMAND_MASTER | PCI_COMMAND_FAST_BACK |
-				PCI_COMMAND_INVALIDATE | PCI_COMMAND_PARITY |
-				(1 << 31) | (1 << 29) | (1 << 28) | (1 << 24);
+		/*
+		 * Map our SDRAM at a known address in PCI space, just in case
+		 * the firmware had other ideas.  Using a nonzero base is
+		 * necessary, since some VGA cards forcefully use PCI addresses
+		 * in the range 0x000a0000 to 0x000c0000. (eg, S3 cards).
+		 */
+		*CSR_PCICACHELINESIZE = 0x00002008;
+		*CSR_PCICSRBASE       = 0;
+		*CSR_PCICSRIOBASE     = 0;
+		*CSR_PCISDRAMBASE     = virt_to_bus((void *)PAGE_OFFSET);
+		*CSR_PCIROMBASE       = 0;
+		*CSR_PCICMD           = PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
+					PCI_COMMAND_MASTER | PCI_COMMAND_FAST_BACK |
+					PCI_COMMAND_INVALIDATE | PCI_COMMAND_PARITY |
+					(1 << 31) | (1 << 29) | (1 << 28) | (1 << 24);
 #endif
 
-	/*
-	 * Clear any existing errors - we aren't
-	 * interested in historical data...
-	 */
-	cntl = *CSR_SA110_CNTL & 0xffffde07;
-	*CSR_SA110_CNTL = cntl | SA110_CNTL_RXSERR;
-
-	pcibios_init_ebsa285();
+		printk(KERN_DEBUG"PCI: DC21285 footbridge, revision %02lX\n",
+			*CSR_CLASSREV & 0xff);
 
-	printk(KERN_DEBUG"PCI: DEC21285 revision %02lX\n", *CSR_CLASSREV & 0xff);
-}
-
-void __init pcibios_fixup_bus(struct pci_bus *bus)
-{
-}
+		switch (machine_arch_type) {
+		case MACH_TYPE_EBSA285:
+			pci_irq_fixup = ebsa_irqval;
+			break;
+
+		case MACH_TYPE_CATS:
+			pci_irq_fixup = cats_irqval;
+			break;
+
+		case MACH_TYPE_NETWINDER:
+			pci_irq_fixup = netwinder_irqval;
+			break;
+		}
+
+		return &dc21285_ops;
+	} else {
+		/*
+		 * Clear any existing errors - we aren't
+		 * interested in historical data...
+		 */
+		cntl = *CSR_SA110_CNTL & 0xffffde07;
+		*CSR_SA110_CNTL = cntl | SA110_CNTL_RXSERR;
+		cntl = *CSR_PCICMD & 0x0000ffff;
+		*CSR_PCICMD = cntl | 1 << 31 | 1 << 29 | 1 << 28 | 1 << 24;
+
+		/*
+		 * Initialise PCI error IRQ after we've finished probing
+		 */
+		setup_arm_irq(IRQ_PCI_ERR, &dc21285_error_action);
 
-char * __init pcibios_setup(char *str)
-{
-	return str;
+		return NULL;
+	}
 }