+++ /dev/null
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/mm.h>
-#include <asm/ifxmips/ifxmips.h>
-#include <asm/ifxmips/ifxmips_irq.h>
-#include <asm/addrspace.h>
-#include <linux/vmalloc.h>
-
-#define IFXMIPS_PCI_MEM_BASE 0x18000000
-#define IFXMIPS_PCI_MEM_SIZE 0x02000000
-#define IFXMIPS_PCI_IO_BASE 0x1AE00000
-#define IFXMIPS_PCI_IO_SIZE 0x00200000
-
-#define IFXMIPS_PCI_CFG_BUSNUM_SHF 16
-#define IFXMIPS_PCI_CFG_DEVNUM_SHF 11
-#define IFXMIPS_PCI_CFG_FUNNUM_SHF 8
-
-#define PCI_ACCESS_READ 0
-#define PCI_ACCESS_WRITE 1
-
-static int ifxmips_pci_read_config_dword(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
-static int ifxmips_pci_write_config_dword(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
-
-struct pci_ops ifxmips_pci_ops = {
- .read = ifxmips_pci_read_config_dword,
- .write = ifxmips_pci_write_config_dword
-};
-
-static struct resource pci_io_resource = {
- .name = "io pci IO space",
- .start = IFXMIPS_PCI_IO_BASE,
- .end = IFXMIPS_PCI_IO_BASE + IFXMIPS_PCI_IO_SIZE - 1,
- .flags = IORESOURCE_IO
-};
-
-static struct resource pci_mem_resource = {
- .name = "ext pci memory space",
- .start = IFXMIPS_PCI_MEM_BASE,
- .end = IFXMIPS_PCI_MEM_BASE + IFXMIPS_PCI_MEM_SIZE - 1,
- .flags = IORESOURCE_MEM
-};
-
-static struct pci_controller ifxmips_pci_controller = {
- .pci_ops = &ifxmips_pci_ops,
- .mem_resource = &pci_mem_resource,
- .mem_offset = 0x00000000UL,
- .io_resource = &pci_io_resource,
- .io_offset = 0x00000000UL,
-};
-
-static u32 ifxmips_pci_mapped_cfg;
-
-static int
-ifxmips_pci_config_access(unsigned char access_type,
- struct pci_bus *bus, unsigned int devfn, unsigned int where, u32 *data)
-{
- unsigned long cfg_base;
- unsigned long flags;
-
- u32 temp;
-
- /* IFXMips support slot from 0 to 15 */
- /* dev_fn 0&0x68 (AD29) is ifxmips itself */
- if ((bus->number != 0) || ((devfn & 0xf8) > 0x78)
- || ((devfn & 0xf8) == 0) || ((devfn & 0xf8) == 0x68))
- return 1;
-
- local_irq_save(flags);
-
- cfg_base = ifxmips_pci_mapped_cfg;
- cfg_base |= (bus->number << IFXMIPS_PCI_CFG_BUSNUM_SHF) | (devfn <<
- IFXMIPS_PCI_CFG_FUNNUM_SHF) | (where & ~0x3);
-
- /* Perform access */
- if (access_type == PCI_ACCESS_WRITE)
- {
-#ifdef CONFIG_IFXMIPS_PCI_HW_SWAP
- writel(swab32(*data), ((u32*)cfg_base));
-#else
- writel(*data, ((u32*)cfg_base));
-#endif
- } else {
- *data = readl(((u32*)(cfg_base)));
-#ifdef CONFIG_IFXMIPS_PCI_HW_SWAP
- *data = swab32(*data);
-#endif
- }
- wmb();
-
- /* clean possible Master abort */
- cfg_base = (ifxmips_pci_mapped_cfg | (0x0 << IFXMIPS_PCI_CFG_FUNNUM_SHF)) + 4;
- temp = readl(((u32*)(cfg_base)));
-#ifdef CONFIG_IFXMIPS_PCI_HW_SWAP
- temp = swab32 (temp);
-#endif
- cfg_base = (ifxmips_pci_mapped_cfg | (0x68 << IFXMIPS_PCI_CFG_FUNNUM_SHF)) + 4;
- writel(temp, ((u32*)cfg_base));
-
- local_irq_restore(flags);
-
- if (((*data) == 0xffffffff) && (access_type == PCI_ACCESS_READ))
- return 1;
-
- return 0;
-}
-
-static int ifxmips_pci_read_config_dword(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 * val)
-{
- u32 data = 0;
-
- if (ifxmips_pci_config_access(PCI_ACCESS_READ, bus, devfn, where, &data))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- if (size == 1)
- *val = (data >> ((where & 3) << 3)) & 0xff;
- else if (size == 2)
- *val = (data >> ((where & 3) << 3)) & 0xffff;
- else
- *val = data;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int ifxmips_pci_write_config_dword(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 val)
-{
- u32 data = 0;
-
- if (size == 4)
- {
- data = val;
- } else {
- if (ifxmips_pci_config_access(PCI_ACCESS_READ, bus, devfn, where, &data))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- if (size == 1)
- data = (data & ~(0xff << ((where & 3) << 3))) |
- (val << ((where & 3) << 3));
- else if (size == 2)
- data = (data & ~(0xffff << ((where & 3) << 3))) |
- (val << ((where & 3) << 3));
- }
-
- if (ifxmips_pci_config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-
-int pcibios_plat_dev_init(struct pci_dev *dev){
- u8 pin;
-
- pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
-
- switch(pin) {
- case 0:
- break;
- case 1:
- //falling edge level triggered:0x4, low level:0xc, rising edge:0x2
- printk("%s:%s[%d] %08X \n", __FILE__, __func__, __LINE__, dev->irq);
- writel(readl(IFXMIPS_EBU_PCC_CON) | 0xc, IFXMIPS_EBU_PCC_CON);
- writel(readl(IFXMIPS_EBU_PCC_IEN) | 0x10, IFXMIPS_EBU_PCC_IEN);
- break;
- case 2:
- case 3:
- case 4:
- printk ("WARNING: interrupt pin %d not supported yet!\n", pin);
- default:
- printk ("WARNING: invalid interrupt pin %d\n", pin);
- return 1;
- }
-
- return 0;
-}
-
-static void __init ifxmips_pci_startup (void){
- /*initialize the first PCI device--ifxmips itself */
- u32 temp_buffer;
- /*TODO: trigger reset */
- writel(readl(IFXMIPS_CGU_IFCCR) & ~0xf00000, IFXMIPS_CGU_IFCCR);
- writel(readl(IFXMIPS_CGU_IFCCR) | 0x800000, IFXMIPS_CGU_IFCCR);
- /* PCIS of IF_CLK of CGU : 1 =>PCI Clock output
- 0 =>clock input
- PADsel of PCI_CR of CGU : 1 =>From CGU
- : 0 =>From pad
- */
- writel(readl(IFXMIPS_CGU_IFCCR) | (1 << 16), IFXMIPS_CGU_IFCCR);
- writel((1 << 31) | (1 << 30), IFXMIPS_CGU_PCICR);
-
- /* prepare GPIO */
- /* PCI_RST: P1.5 ALT 01 */
- //pliu20060613: start
- writel(readl(IFXMIPS_GPIO_P1_OUT) | (1 << 5), IFXMIPS_GPIO_P1_OUT);
- writel(readl(IFXMIPS_GPIO_P1_OD) | (1 << 5), IFXMIPS_GPIO_P1_OD);
- writel(readl(IFXMIPS_GPIO_P1_DIR) | (1 << 5), IFXMIPS_GPIO_P1_DIR);
- writel(readl(IFXMIPS_GPIO_P1_ALTSEL1) & ~(1 << 5), IFXMIPS_GPIO_P1_ALTSEL1);
- writel(readl(IFXMIPS_GPIO_P1_ALTSEL0) & ~(1 << 5), IFXMIPS_GPIO_P1_ALTSEL0);
- //pliu20060613: end
- /* PCI_REQ1: P1.13 ALT 01 */
- /* PCI_GNT1: P1.14 ALT 01 */
- writel(readl(IFXMIPS_GPIO_P1_DIR) & ~0x2000, IFXMIPS_GPIO_P1_DIR);
- writel(readl(IFXMIPS_GPIO_P1_DIR) | 0x4000, IFXMIPS_GPIO_P1_DIR);
- writel(readl(IFXMIPS_GPIO_P1_ALTSEL1) & ~0x6000, IFXMIPS_GPIO_P1_ALTSEL1);
- writel(readl(IFXMIPS_GPIO_P1_ALTSEL0) | 0x6000, IFXMIPS_GPIO_P1_ALTSEL0);
- /* PCI_REQ2: P1.15 ALT 10 */
- /* PCI_GNT2: P1.7 ALT 10 */
-
-
- /* enable auto-switching between PCI and EBU */
- writel(0xa, PCI_CR_CLK_CTRL);
- /* busy, i.e. configuration is not done, PCI access has to be retried */
- writel(readl(PCI_CR_PCI_MOD) & ~(1 << 24), PCI_CR_PCI_MOD);
- wmb ();
- /* BUS Master/IO/MEM access */
- writel(readl(PCI_CS_STS_CMD) | 7, PCI_CS_STS_CMD);
-
- temp_buffer = readl(PCI_CR_PC_ARB);
- /* enable external 2 PCI masters */
- temp_buffer &= (~(0xf << 16));
- /* enable internal arbiter */
- temp_buffer |= (1 << INTERNAL_ARB_ENABLE_BIT);
- /* enable internal PCI master reqest */
- temp_buffer &= (~(3 << PCI_MASTER0_REQ_MASK_2BITS));
-
- /* enable EBU reqest */
- temp_buffer &= (~(3 << PCI_MASTER1_REQ_MASK_2BITS));
-
- /* enable all external masters request */
- temp_buffer &= (~(3 << PCI_MASTER2_REQ_MASK_2BITS));
- writel(temp_buffer, PCI_CR_PC_ARB);
-
- wmb ();
-
- /* FPI ==> PCI MEM address mapping */
- /* base: 0xb8000000 == > 0x18000000 */
- /* size: 8x4M = 32M */
- writel(0x18000000, PCI_CR_FCI_ADDR_MAP0);
- writel(0x18400000, PCI_CR_FCI_ADDR_MAP1);
- writel(0x18800000, PCI_CR_FCI_ADDR_MAP2);
- writel(0x18c00000, PCI_CR_FCI_ADDR_MAP3);
- writel(0x19000000, PCI_CR_FCI_ADDR_MAP4);
- writel(0x19400000, PCI_CR_FCI_ADDR_MAP5);
- writel(0x19800000, PCI_CR_FCI_ADDR_MAP6);
- writel(0x19c00000, PCI_CR_FCI_ADDR_MAP7);
-
- /* FPI ==> PCI IO address mapping */
- /* base: 0xbAE00000 == > 0xbAE00000 */
- /* size: 2M */
- writel(0xbae00000, PCI_CR_FCI_ADDR_MAP11hg);
-
- /* PCI ==> FPI address mapping */
- /* base: 0x0 ==> 0x0 */
- /* size: 32M */
- /* BAR1 32M map to SDR address */
- writel(0x0e000008, PCI_CR_BAR11MASK);
- writel(0, PCI_CR_PCI_ADDR_MAP11);
- writel(0, PCI_CS_BASE_ADDR1);
-#ifdef CONFIG_IFXMIPS_PCI_HW_SWAP
- /* both TX and RX endian swap are enabled */
- IFXMIPS_PCI_REG32 (PCI_CR_PCI_EOI_REG) |= 3;
- wmb ();
-#endif
- /*TODO: disable BAR2 & BAR3 - why was this in the origianl infineon code */
- writel(readl(PCI_CR_BAR12MASK) | 0x80000000, PCI_CR_BAR12MASK);
- writel(readl(PCI_CR_BAR13MASK) | 0x80000000, PCI_CR_BAR13MASK);
- /*use 8 dw burse length */
- writel(0x303, PCI_CR_FCI_BURST_LENGTH);
-
- writel(readl(PCI_CR_PCI_MOD) | (1 << 24), PCI_CR_PCI_MOD);
- wmb();
- writel(readl(IFXMIPS_GPIO_P1_OUT) & ~(1 << 5), IFXMIPS_GPIO_P1_OUT);
- wmb();
- mdelay (1);
- writel(readl(IFXMIPS_GPIO_P1_OUT) | (1 << 5), IFXMIPS_GPIO_P1_OUT);
-}
-
-int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin){
- printk("\n\n\n%s:%s[%d] %d %d\n", __FILE__, __func__, __LINE__, slot, pin);
- switch (slot) {
- case 13:
- /* IDSEL = AD29 --> USB Host Controller */
- return (INT_NUM_IM1_IRL0 + 17);
- case 14:
- /* IDSEL = AD30 --> mini PCI connector */
- //return (INT_NUM_IM1_IRL0 + 14);
- return (INT_NUM_IM0_IRL0 + 22);
- default:
- printk("Warning: no IRQ found for PCI device in slot %d, pin %d\n", slot, pin);
- return 0;
- }
-}
-
-int pcibios_init(void){
- extern int pci_probe_only;
-
- pci_probe_only = 0;
- printk ("PCI: Probing PCI hardware on host bus 0.\n");
-
- ifxmips_pci_startup ();
-
- // IFXMIPS_PCI_REG32(PCI_CR_CLK_CTRL_REG) &= (~8);
- ifxmips_pci_mapped_cfg = ioremap_nocache(0x17000000, 0x800 * 16);
- printk("IFXMips PCI mapped to 0x%08X\n", (unsigned long)ifxmips_pci_mapped_cfg);
-
- ifxmips_pci_controller.io_map_base = (unsigned long)ioremap(IFXMIPS_PCI_IO_BASE, IFXMIPS_PCI_IO_SIZE - 1);
-
- printk("IFXMips PCI I/O mapped to 0x%08X\n", (unsigned long)ifxmips_pci_controller.io_map_base);
-
- register_pci_controller(&ifxmips_pci_controller);
-
- return 0;
-}
-
-arch_initcall(pcibios_init);
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