--- /dev/null
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * David Mueller, ELSOFT AG, <d.mueller@elsoft.ch>
+ *
+ * (C) Copyright 2003
+ * Texas Instruments, <www.ti.com>
+ * Kshitij Gupta <Kshitij@ti.com>
+ *
+ * (C) Copyright 2004
+ * ARM Ltd.
+ * Philippe Robin, <philippe.robin@arm.com>
+ *
+ * (C) Copyright 2011
+ * Linaro
+ * Linus Walleij <linus.walleij@linaro.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <common.h>
+#include <pci.h>
+#include <asm/io.h>
+#include "integrator-sc.h"
+#include "pci_v3.h"
+
+#define INTEGRATOR_BOOT_ROM_BASE 0x20000000
+#define INTEGRATOR_HDR0_SDRAM_BASE 0x80000000
+
+/*
+ * These are in the physical addresses on the CPU side, i.e.
+ * where we read and write stuff - you don't want to try to
+ * move these around
+ */
+#define PHYS_PCI_MEM_BASE 0x40000000
+#define PHYS_PCI_IO_BASE 0x60000000 /* PCI I/O space base */
+#define PHYS_PCI_CONFIG_BASE 0x61000000
+#define PHYS_PCI_V3_BASE 0x62000000 /* V360EPC registers */
+#define SZ_256M 0x10000000
+
+/*
+ * These are in the PCI BUS address space
+ * Set to 0x00000000 in the Linux kernel, 0x40000000 in Boot monitor
+ * we follow the example of the kernel, because that is the address
+ * range that devices actually use - what would they be doing at
+ * 0x40000000?
+ */
+#define PCI_BUS_NONMEM_START 0x00000000
+#define PCI_BUS_NONMEM_SIZE SZ_256M
+
+#define PCI_BUS_PREMEM_START (PCI_BUS_NONMEM_START + PCI_BUS_NONMEM_SIZE)
+#define PCI_BUS_PREMEM_SIZE SZ_256M
+
+#if PCI_BUS_NONMEM_START & 0x000fffff
+#error PCI_BUS_NONMEM_START must be megabyte aligned
+#endif
+#if PCI_BUS_PREMEM_START & 0x000fffff
+#error PCI_BUS_PREMEM_START must be megabyte aligned
+#endif
+
+/*
+ * Initialize PCI Devices, report devices found.
+ */
+
+#ifndef CONFIG_PCI_PNP
+#define PCI_ENET0_IOADDR 0x60000000 /* First card in PCI I/O space */
+#define PCI_ENET0_MEMADDR 0x40000000 /* First card in PCI memory space */
+static struct pci_config_table pci_integrator_config_table[] = {
+ { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 0x0f, PCI_ANY_ID,
+ pci_cfgfunc_config_device, { PCI_ENET0_IOADDR,
+ PCI_ENET0_MEMADDR,
+ PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER }},
+ { }
+};
+#endif /* CONFIG_PCI_PNP */
+
+/* V3 access routines */
+#define v3_writeb(o, v) __raw_writeb(v, PHYS_PCI_V3_BASE + (unsigned int)(o))
+#define v3_readb(o) (__raw_readb(PHYS_PCI_V3_BASE + (unsigned int)(o)))
+
+#define v3_writew(o, v) __raw_writew(v, PHYS_PCI_V3_BASE + (unsigned int)(o))
+#define v3_readw(o) (__raw_readw(PHYS_PCI_V3_BASE + (unsigned int)(o)))
+
+#define v3_writel(o, v) __raw_writel(v, PHYS_PCI_V3_BASE + (unsigned int)(o))
+#define v3_readl(o) (__raw_readl(PHYS_PCI_V3_BASE + (unsigned int)(o)))
+
+static unsigned long v3_open_config_window(pci_dev_t bdf, int offset)
+{
+ unsigned int address, mapaddress;
+ unsigned int busnr = PCI_BUS(bdf);
+ unsigned int devfn = PCI_FUNC(bdf);
+
+ /*
+ * Trap out illegal values
+ */
+ if (offset > 255)
+ BUG();
+ if (busnr > 255)
+ BUG();
+ if (devfn > 255)
+ BUG();
+
+ if (busnr == 0) {
+ /*
+ * Linux calls the thing U-Boot calls "DEV" "SLOT"
+ * instead, but it's the same 5 bits
+ */
+ int slot = PCI_DEV(bdf);
+
+ /*
+ * local bus segment so need a type 0 config cycle
+ *
+ * build the PCI configuration "address" with one-hot in
+ * A31-A11
+ *
+ * mapaddress:
+ * 3:1 = config cycle (101)
+ * 0 = PCI A1 & A0 are 0 (0)
+ */
+ address = PCI_FUNC(bdf) << 8;
+ mapaddress = V3_LB_MAP_TYPE_CONFIG;
+
+ if (slot > 12)
+ /*
+ * high order bits are handled by the MAP register
+ */
+ mapaddress |= 1 << (slot - 5);
+ else
+ /*
+ * low order bits handled directly in the address
+ */
+ address |= 1 << (slot + 11);
+ } else {
+ /*
+ * not the local bus segment so need a type 1 config cycle
+ *
+ * address:
+ * 23:16 = bus number
+ * 15:11 = slot number (7:3 of devfn)
+ * 10:8 = func number (2:0 of devfn)
+ *
+ * mapaddress:
+ * 3:1 = config cycle (101)
+ * 0 = PCI A1 & A0 from host bus (1)
+ */
+ mapaddress = V3_LB_MAP_TYPE_CONFIG | V3_LB_MAP_AD_LOW_EN;
+ address = (busnr << 16) | (devfn << 8);
+ }
+
+ /*
+ * Set up base0 to see all 512Mbytes of memory space (not
+ * prefetchable), this frees up base1 for re-use by
+ * configuration memory
+ */
+ v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) |
+ V3_LB_BASE_ADR_SIZE_512MB | V3_LB_BASE_ENABLE);
+
+ /*
+ * Set up base1/map1 to point into configuration space.
+ */
+ v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_CONFIG_BASE) |
+ V3_LB_BASE_ADR_SIZE_16MB | V3_LB_BASE_ENABLE);
+ v3_writew(V3_LB_MAP1, mapaddress);
+
+ return PHYS_PCI_CONFIG_BASE + address + offset;
+}
+
+static void v3_close_config_window(void)
+{
+ /*
+ * Reassign base1 for use by prefetchable PCI memory
+ */
+ v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE + SZ_256M) |
+ V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH |
+ V3_LB_BASE_ENABLE);
+ v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(PCI_BUS_PREMEM_START) |
+ V3_LB_MAP_TYPE_MEM_MULTIPLE);
+
+ /*
+ * And shrink base0 back to a 256M window (NOTE: MAP0 already correct)
+ */
+ v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) |
+ V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE);
+}
+
+static int pci_integrator_read_byte(struct pci_controller *hose, pci_dev_t bdf,
+ int offset, unsigned char *val)
+{
+ unsigned long addr;
+
+ addr = v3_open_config_window(bdf, offset);
+ *val = __raw_readb(addr);
+ v3_close_config_window();
+ return 0;
+}
+
+static int pci_integrator_read__word(struct pci_controller *hose,
+ pci_dev_t bdf, int offset,
+ unsigned short *val)
+{
+ unsigned long addr;
+
+ addr = v3_open_config_window(bdf, offset);
+ *val = __raw_readw(addr);
+ v3_close_config_window();
+ return 0;
+}
+
+static int pci_integrator_read_dword(struct pci_controller *hose,
+ pci_dev_t bdf, int offset,
+ unsigned int *val)
+{
+ unsigned long addr;
+
+ addr = v3_open_config_window(bdf, offset);
+ *val = __raw_readl(addr);
+ v3_close_config_window();
+ return 0;
+}
+
+static int pci_integrator_write_byte(struct pci_controller *hose,
+ pci_dev_t bdf, int offset,
+ unsigned char val)
+{
+ unsigned long addr;
+
+ addr = v3_open_config_window(bdf, offset);
+ __raw_writeb((u8)val, addr);
+ __raw_readb(addr);
+ v3_close_config_window();
+ return 0;
+}
+
+static int pci_integrator_write_word(struct pci_controller *hose,
+ pci_dev_t bdf, int offset,
+ unsigned short val)
+{
+ unsigned long addr;
+
+ addr = v3_open_config_window(bdf, offset);
+ __raw_writew((u8)val, addr);
+ __raw_readw(addr);
+ v3_close_config_window();
+ return 0;
+}
+
+static int pci_integrator_write_dword(struct pci_controller *hose,
+ pci_dev_t bdf, int offset,
+ unsigned int val)
+{
+ unsigned long addr;
+
+ addr = v3_open_config_window(bdf, offset);
+ __raw_writel((u8)val, addr);
+ __raw_readl(addr);
+ v3_close_config_window();
+ return 0;
+}
+
+struct pci_controller integrator_hose = {
+#ifndef CONFIG_PCI_PNP
+ config_table: pci_integrator_config_table,
+#endif
+};
+
+void pci_init_board(void)
+{
+ struct pci_controller *hose = &integrator_hose;
+ u16 val;
+
+ /* setting this register will take the V3 out of reset */
+ __raw_writel(SC_PCI_PCIEN, SC_PCI);
+
+ /* Wait for 230 ms (from spec) before accessing any V3 registers */
+ mdelay(230);
+
+ /* Now write the Base I/O Address Word to PHYS_PCI_V3_BASE + 0x6E */
+ v3_writew(V3_LB_IO_BASE, (PHYS_PCI_V3_BASE >> 16));
+
+ /* Wait for the mailbox to settle */
+ do {
+ v3_writeb(V3_MAIL_DATA, 0xAA);
+ v3_writeb(V3_MAIL_DATA + 4, 0x55);
+ } while (v3_readb(V3_MAIL_DATA) != 0xAA ||
+ v3_readb(V3_MAIL_DATA + 4) != 0x55);
+
+ /* Make sure that V3 register access is not locked, if it is, unlock it */
+ if (v3_readw(V3_SYSTEM) & V3_SYSTEM_M_LOCK)
+ v3_writew(V3_SYSTEM, 0xA05F);
+
+ /*
+ * Ensure that the slave accesses from PCI are disabled while we
+ * setup memory windows
+ */
+ val = v3_readw(V3_PCI_CMD);
+ val &= ~(V3_COMMAND_M_MEM_EN | V3_COMMAND_M_IO_EN);
+ v3_writew(V3_PCI_CMD, val);
+
+ /* Clear RST_OUT to 0; keep the PCI bus in reset until we've finished */
+ val = v3_readw(V3_SYSTEM);
+ val &= ~V3_SYSTEM_M_RST_OUT;
+ v3_writew(V3_SYSTEM, val);
+
+ /* Make all accesses from PCI space retry until we're ready for them */
+ val = v3_readw(V3_PCI_CFG);
+ val |= V3_PCI_CFG_M_RETRY_EN;
+ v3_writew(V3_PCI_CFG, val);
+
+ /*
+ * Set up any V3 PCI Configuration Registers that we absolutely have to.
+ * LB_CFG controls Local Bus protocol.
+ * Enable LocalBus byte strobes for READ accesses too.
+ * set bit 7 BE_IMODE and bit 6 BE_OMODE
+ */
+ val = v3_readw(V3_LB_CFG);
+ val |= 0x0C0;
+ v3_writew(V3_LB_CFG, val);
+
+ /* PCI_CMD controls overall PCI operation. Enable PCI bus master. */
+ val = v3_readw(V3_PCI_CMD);
+ val |= V3_COMMAND_M_MASTER_EN;
+ v3_writew(V3_PCI_CMD, val);
+
+ /*
+ * PCI_MAP0 controls where the PCI to CPU memory window is on
+ * Local Bus
+ */
+ v3_writel(V3_PCI_MAP0,
+ (INTEGRATOR_BOOT_ROM_BASE) | (V3_PCI_MAP_M_ADR_SIZE_512MB |
+ V3_PCI_MAP_M_REG_EN |
+ V3_PCI_MAP_M_ENABLE));
+
+ /* PCI_BASE0 is the PCI address of the start of the window */
+ v3_writel(V3_PCI_BASE0, INTEGRATOR_BOOT_ROM_BASE);
+
+ /* PCI_MAP1 is LOCAL address of the start of the window */
+ v3_writel(V3_PCI_MAP1,
+ (INTEGRATOR_HDR0_SDRAM_BASE) | (V3_PCI_MAP_M_ADR_SIZE_1GB |
+ V3_PCI_MAP_M_REG_EN |
+ V3_PCI_MAP_M_ENABLE));
+
+ /* PCI_BASE1 is the PCI address of the start of the window */
+ v3_writel(V3_PCI_BASE1, INTEGRATOR_HDR0_SDRAM_BASE);
+
+ /*
+ * Set up memory the windows from local bus memory into PCI
+ * configuration, I/O and Memory regions.
+ * PCI I/O, LB_BASE2 and LB_MAP2 are used exclusively for this.
+ */
+ v3_writew(V3_LB_BASE2,
+ v3_addr_to_lb_map(PHYS_PCI_IO_BASE) | V3_LB_BASE_ENABLE);
+ v3_writew(V3_LB_MAP2, 0);
+
+ /* PCI Configuration, use LB_BASE1/LB_MAP1. */
+
+ /*
+ * PCI Memory use LB_BASE0/LB_MAP0 and LB_BASE1/LB_MAP1
+ * Map first 256Mbytes as non-prefetchable via BASE0/MAP0
+ */
+ v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) |
+ V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE);
+ v3_writew(V3_LB_MAP0,
+ v3_addr_to_lb_map(PCI_BUS_NONMEM_START) | V3_LB_MAP_TYPE_MEM);
+
+ /* Map second 256 Mbytes as prefetchable via BASE1/MAP1 */
+ v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE + SZ_256M) |
+ V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH |
+ V3_LB_BASE_ENABLE);
+ v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(PCI_BUS_PREMEM_START) |
+ V3_LB_MAP_TYPE_MEM_MULTIPLE);
+
+ /* Dump PCI to local address space mappings */
+ debug("LB_BASE0 = %08x\n", v3_readl(V3_LB_BASE0));
+ debug("LB_MAP0 = %04x\n", v3_readw(V3_LB_MAP0));
+ debug("LB_BASE1 = %08x\n", v3_readl(V3_LB_BASE1));
+ debug("LB_MAP1 = %04x\n", v3_readw(V3_LB_MAP1));
+ debug("LB_BASE2 = %04x\n", v3_readw(V3_LB_BASE2));
+ debug("LB_MAP2 = %04x\n", v3_readw(V3_LB_MAP2));
+ debug("LB_IO_BASE = %04x\n", v3_readw(V3_LB_IO_BASE));
+
+ /*
+ * Allow accesses to PCI Configuration space and set up A1, A0 for
+ * type 1 config cycles
+ */
+ val = v3_readw(V3_PCI_CFG);
+ val &= ~(V3_PCI_CFG_M_RETRY_EN | V3_PCI_CFG_M_AD_LOW1);
+ val |= V3_PCI_CFG_M_AD_LOW0;
+ v3_writew(V3_PCI_CFG, val);
+
+ /* now we can allow incoming PCI MEMORY accesses */
+ val = v3_readw(V3_PCI_CMD);
+ val |= V3_COMMAND_M_MEM_EN;
+ v3_writew(V3_PCI_CMD, val);
+
+ /*
+ * Set RST_OUT to take the PCI bus is out of reset, PCI devices can
+ * now initialise.
+ */
+ val = v3_readw(V3_SYSTEM);
+ val |= V3_SYSTEM_M_RST_OUT;
+ v3_writew(V3_SYSTEM, val);
+
+ /* Lock the V3 system register so that no one else can play with it */
+ val = v3_readw(V3_SYSTEM);
+ val |= V3_SYSTEM_M_LOCK;
+ v3_writew(V3_SYSTEM, val);
+
+ /*
+ * Configure and register the PCI hose
+ */
+ hose->first_busno = 0;
+ hose->last_busno = 0xff;
+
+ /* System memory space, window 0 256 MB non-prefetchable */
+ pci_set_region(hose->regions + 0,
+ PCI_BUS_NONMEM_START, PHYS_PCI_MEM_BASE,
+ SZ_256M,
+ PCI_REGION_MEM);
+
+ /* System memory space, window 1 256 MB prefetchable */
+ pci_set_region(hose->regions + 1,
+ PCI_BUS_PREMEM_START, PHYS_PCI_MEM_BASE + SZ_256M,
+ SZ_256M,
+ PCI_REGION_MEM |
+ PCI_REGION_PREFETCH);
+
+ /* PCI I/O space */
+ pci_set_region(hose->regions + 2,
+ 0x00000000, PHYS_PCI_IO_BASE, 0x01000000,
+ PCI_REGION_IO);
+
+ /* PCI Memory - config space */
+ pci_set_region(hose->regions + 3,
+ 0x00000000, PHYS_PCI_CONFIG_BASE, 0x01000000,
+ PCI_REGION_MEM);
+ /* PCI V3 regs */
+ pci_set_region(hose->regions + 4,
+ 0x00000000, PHYS_PCI_V3_BASE, 0x01000000,
+ PCI_REGION_MEM);
+
+ hose->region_count = 5;
+
+ pci_set_ops(hose,
+ pci_integrator_read_byte,
+ pci_integrator_read__word,
+ pci_integrator_read_dword,
+ pci_integrator_write_byte,
+ pci_integrator_write_word,
+ pci_integrator_write_dword);
+
+ pci_register_hose(hose);
+
+ pciauto_config_init(hose);
+ pciauto_config_device(hose, 0);
+
+ hose->last_busno = pci_hose_scan(hose);
+}
Code Review / kvmfornfv.git / blobdiff