diff options
Diffstat (limited to 'arch/ppc/syslib/mpc10x_common.c')
| -rw-r--r-- | arch/ppc/syslib/mpc10x_common.c | 510 |
1 files changed, 510 insertions, 0 deletions
diff --git a/arch/ppc/syslib/mpc10x_common.c b/arch/ppc/syslib/mpc10x_common.c new file mode 100644 index 00000000000..fd93adfd464 --- /dev/null +++ b/arch/ppc/syslib/mpc10x_common.c @@ -0,0 +1,510 @@ +/* + * arch/ppc/syslib/mpc10x_common.c + * + * Common routines for the Motorola SPS MPC106, MPC107 and MPC8240 Host bridge, + * Mem ctlr, EPIC, etc. + * + * Author: Mark A. Greer + * mgreer@mvista.com + * + * 2001 (c) MontaVista, Software, Inc. This file is licensed under + * the terms of the GNU General Public License version 2. This program + * is licensed "as is" without any warranty of any kind, whether express + * or implied. + */ + +/* + * *** WARNING - A BAT MUST be set to access the PCI config addr/data regs *** + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/slab.h> + +#include <asm/byteorder.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/uaccess.h> +#include <asm/machdep.h> +#include <asm/pci-bridge.h> +#include <asm/open_pic.h> +#include <asm/mpc10x.h> +#include <asm/ocp.h> + +/* The OCP structure is fixed by code below, before OCP initialises. + paddr depends on where the board places the EUMB. + - fixed in mpc10x_bridge_init(). + irq depends on two things: + > does the board use the EPIC at all? (PCORE does not). + > is the EPIC in serial or parallel mode? + - fixed in mpc10x_set_openpic(). +*/ + +#ifdef CONFIG_MPC10X_OPENPIC +#ifdef CONFIG_EPIC_SERIAL_MODE +#define EPIC_IRQ_BASE (epic_serial_mode ? 16 : 5) +#else +#define EPIC_IRQ_BASE 5 +#endif +#define MPC10X_I2C_IRQ (EPIC_IRQ_BASE + NUM_8259_INTERRUPTS) +#define MPC10X_DMA0_IRQ (EPIC_IRQ_BASE + 1 + NUM_8259_INTERRUPTS) +#define MPC10X_DMA1_IRQ (EPIC_IRQ_BASE + 2 + NUM_8259_INTERRUPTS) +#else +#define MPC10X_I2C_IRQ OCP_IRQ_NA +#define MPC10X_DMA0_IRQ OCP_IRQ_NA +#define MPC10X_DMA1_IRQ OCP_IRQ_NA +#endif + + +struct ocp_def core_ocp[] = { + { .vendor = OCP_VENDOR_INVALID + } +}; + +static struct ocp_fs_i2c_data mpc10x_i2c_data = { + .flags = 0 +}; +static struct ocp_def mpc10x_i2c_ocp = { + .vendor = OCP_VENDOR_MOTOROLA, + .function = OCP_FUNC_IIC, + .index = 0, + .additions = &mpc10x_i2c_data +}; + +static struct ocp_def mpc10x_dma_ocp[2] = { +{ .vendor = OCP_VENDOR_MOTOROLA, + .function = OCP_FUNC_DMA, + .index = 0 }, +{ .vendor = OCP_VENDOR_MOTOROLA, + .function = OCP_FUNC_DMA, + .index = 1 } +}; + +/* Set resources to match bridge memory map */ +void __init +mpc10x_bridge_set_resources(int map, struct pci_controller *hose) +{ + + switch (map) { + case MPC10X_MEM_MAP_A: + pci_init_resource(&hose->io_resource, + 0x00000000, + 0x3f7fffff, + IORESOURCE_IO, + "PCI host bridge"); + + pci_init_resource (&hose->mem_resources[0], + 0xc0000000, + 0xfeffffff, + IORESOURCE_MEM, + "PCI host bridge"); + break; + case MPC10X_MEM_MAP_B: + pci_init_resource(&hose->io_resource, + 0x00000000, + 0x00bfffff, + IORESOURCE_IO, + "PCI host bridge"); + + pci_init_resource (&hose->mem_resources[0], + 0x80000000, + 0xfcffffff, + IORESOURCE_MEM, + "PCI host bridge"); + break; + default: + printk("mpc10x_bridge_set_resources: " + "Invalid map specified\n"); + if (ppc_md.progress) + ppc_md.progress("mpc10x:exit1", 0x100); + } +} +/* + * Do some initialization and put the EUMB registers at the specified address + * (also map the EPIC registers into virtual space--OpenPIC_Addr will be set). + * + * The EPIC is not on the 106, only the 8240 and 107. + */ +int __init +mpc10x_bridge_init(struct pci_controller *hose, + uint current_map, + uint new_map, + uint phys_eumb_base) +{ + int host_bridge, picr1, picr1_bit; + ulong pci_config_addr, pci_config_data; + u_char pir, byte; + + if (ppc_md.progress) ppc_md.progress("mpc10x:enter", 0x100); + + /* Set up for current map so we can get at config regs */ + switch (current_map) { + case MPC10X_MEM_MAP_A: + setup_indirect_pci(hose, + MPC10X_MAPA_CNFG_ADDR, + MPC10X_MAPA_CNFG_DATA); + break; + case MPC10X_MEM_MAP_B: + setup_indirect_pci(hose, + MPC10X_MAPB_CNFG_ADDR, + MPC10X_MAPB_CNFG_DATA); + break; + default: + printk("mpc10x_bridge_init: %s\n", + "Invalid current map specified"); + if (ppc_md.progress) + ppc_md.progress("mpc10x:exit1", 0x100); + return -1; + } + + /* Make sure it's a supported bridge */ + early_read_config_dword(hose, + 0, + PCI_DEVFN(0,0), + PCI_VENDOR_ID, + &host_bridge); + + switch (host_bridge) { + case MPC10X_BRIDGE_106: + case MPC10X_BRIDGE_8240: + case MPC10X_BRIDGE_107: + case MPC10X_BRIDGE_8245: + break; + default: + if (ppc_md.progress) + ppc_md.progress("mpc10x:exit2", 0x100); + return -1; + } + + switch (new_map) { + case MPC10X_MEM_MAP_A: + MPC10X_SETUP_HOSE(hose, A); + pci_config_addr = MPC10X_MAPA_CNFG_ADDR; + pci_config_data = MPC10X_MAPA_CNFG_DATA; + picr1_bit = MPC10X_CFG_PICR1_ADDR_MAP_A; + break; + case MPC10X_MEM_MAP_B: + MPC10X_SETUP_HOSE(hose, B); + pci_config_addr = MPC10X_MAPB_CNFG_ADDR; + pci_config_data = MPC10X_MAPB_CNFG_DATA; + picr1_bit = MPC10X_CFG_PICR1_ADDR_MAP_B; + break; + default: + printk("mpc10x_bridge_init: %s\n", + "Invalid new map specified"); + if (ppc_md.progress) + ppc_md.progress("mpc10x:exit3", 0x100); + return -1; + } + + /* Make bridge use the 'new_map', if not already usng it */ + if (current_map != new_map) { + early_read_config_dword(hose, + 0, + PCI_DEVFN(0,0), + MPC10X_CFG_PICR1_REG, + &picr1); + + picr1 = (picr1 & ~MPC10X_CFG_PICR1_ADDR_MAP_MASK) | + picr1_bit; + + early_write_config_dword(hose, + 0, + PCI_DEVFN(0,0), + MPC10X_CFG_PICR1_REG, + picr1); + + asm volatile("sync"); + + /* Undo old mappings & map in new cfg data/addr regs */ + iounmap((void *)hose->cfg_addr); + iounmap((void *)hose->cfg_data); + + setup_indirect_pci(hose, + pci_config_addr, + pci_config_data); + } + + /* Setup resources to match map */ + mpc10x_bridge_set_resources(new_map, hose); + + /* + * Want processor accesses of 0xFDxxxxxx to be mapped + * to PCI memory space at 0x00000000. Do not want + * host bridge to respond to PCI memory accesses of + * 0xFDxxxxxx. Do not want host bridge to respond + * to PCI memory addresses 0xFD000000-0xFDFFFFFF; + * want processor accesses from 0x000A0000-0x000BFFFF + * to be forwarded to system memory. + * + * Only valid if not in agent mode and using MAP B. + */ + if (new_map == MPC10X_MEM_MAP_B) { + early_read_config_byte(hose, + 0, + PCI_DEVFN(0,0), + MPC10X_CFG_MAPB_OPTIONS_REG, + &byte); + + byte &= ~(MPC10X_CFG_MAPB_OPTIONS_PFAE | + MPC10X_CFG_MAPB_OPTIONS_PCICH | + MPC10X_CFG_MAPB_OPTIONS_PROCCH); + + if (host_bridge != MPC10X_BRIDGE_106) { + byte |= MPC10X_CFG_MAPB_OPTIONS_CFAE; + } + + early_write_config_byte(hose, + 0, + PCI_DEVFN(0,0), + MPC10X_CFG_MAPB_OPTIONS_REG, + byte); + } + + if (host_bridge != MPC10X_BRIDGE_106) { + early_read_config_byte(hose, + 0, + PCI_DEVFN(0,0), + MPC10X_CFG_PIR_REG, + &pir); + + if (pir != MPC10X_CFG_PIR_HOST_BRIDGE) { + printk("Host bridge in Agent mode\n"); + /* Read or Set LMBAR & PCSRBAR? */ + } + + /* Set base addr of the 8240/107 EUMB. */ + early_write_config_dword(hose, + 0, + PCI_DEVFN(0,0), + MPC10X_CFG_EUMBBAR, + phys_eumb_base); +#ifdef CONFIG_MPC10X_OPENPIC + /* Map EPIC register part of EUMB into vitual memory - PCORE + uses an i8259 instead of EPIC. */ + OpenPIC_Addr = + ioremap(phys_eumb_base + MPC10X_EUMB_EPIC_OFFSET, + MPC10X_EUMB_EPIC_SIZE); +#endif + mpc10x_i2c_ocp.paddr = phys_eumb_base + MPC10X_EUMB_I2C_OFFSET; + mpc10x_i2c_ocp.irq = MPC10X_I2C_IRQ; + ocp_add_one_device(&mpc10x_i2c_ocp); + mpc10x_dma_ocp[0].paddr = phys_eumb_base + + MPC10X_EUMB_DMA_OFFSET + 0x100; + mpc10x_dma_ocp[0].irq = MPC10X_DMA0_IRQ; + ocp_add_one_device(&mpc10x_dma_ocp[0]); + mpc10x_dma_ocp[1].paddr = phys_eumb_base + + MPC10X_EUMB_DMA_OFFSET + 0x200; + mpc10x_dma_ocp[1].irq = MPC10X_DMA1_IRQ; + ocp_add_one_device(&mpc10x_dma_ocp[1]); + } + +#ifdef CONFIG_MPC10X_STORE_GATHERING + mpc10x_enable_store_gathering(hose); +#else + mpc10x_disable_store_gathering(hose); +#endif + + /* + * 8240 erratum 26, 8241/8245 erratum 29, 107 erratum 23: speculative + * PCI reads may return stale data so turn off. + */ + if ((host_bridge == MPC10X_BRIDGE_8240) + || (host_bridge == MPC10X_BRIDGE_8245) + || (host_bridge == MPC10X_BRIDGE_107)) { + + early_read_config_dword(hose, 0, PCI_DEVFN(0,0), + MPC10X_CFG_PICR1_REG, &picr1); + + picr1 &= ~MPC10X_CFG_PICR1_SPEC_PCI_RD; + + early_write_config_dword(hose, 0, PCI_DEVFN(0,0), + MPC10X_CFG_PICR1_REG, picr1); + } + + /* + * 8241/8245 erratum 28: PCI reads from local memory may return + * stale data. Workaround by setting PICR2[0] to disable copyback + * optimization. Oddly, the latest available user manual for the + * 8245 (Rev 2., dated 10/2003) says PICR2[0] is reserverd. + */ + if (host_bridge == MPC10X_BRIDGE_8245) { + ulong picr2; + + early_read_config_dword(hose, 0, PCI_DEVFN(0,0), + MPC10X_CFG_PICR2_REG, &picr2); + + picr2 |= MPC10X_CFG_PICR2_COPYBACK_OPT; + + early_write_config_dword(hose, 0, PCI_DEVFN(0,0), + MPC10X_CFG_PICR2_REG, picr2); + } + + if (ppc_md.progress) ppc_md.progress("mpc10x:exit", 0x100); + return 0; +} + +/* + * Need to make our own PCI config space access macros because + * mpc10x_get_mem_size() is called before the data structures are set up for + * the 'early_xxx' and 'indirect_xxx' routines to work. + * Assumes bus 0. + */ +#define MPC10X_CFG_read(val, addr, type, op) *val = op((type)(addr)) +#define MPC10X_CFG_write(val, addr, type, op) op((type *)(addr), (val)) + +#define MPC10X_PCI_OP(rw, size, type, op, mask) \ +static void \ +mpc10x_##rw##_config_##size(uint *cfg_addr, uint *cfg_data, int devfn, int offset, type val) \ +{ \ + out_be32(cfg_addr, \ + ((offset & 0xfc) << 24) | (devfn << 16) \ + | (0 << 8) | 0x80); \ + MPC10X_CFG_##rw(val, cfg_data + (offset & mask), type, op); \ + return; \ +} + +MPC10X_PCI_OP(read, byte, u8 *, in_8, 3) +MPC10X_PCI_OP(read, dword, u32 *, in_le32, 0) +#if 0 /* Not used */ +MPC10X_PCI_OP(write, byte, u8, out_8, 3) +MPC10X_PCI_OP(read, word, u16 *, in_le16, 2) +MPC10X_PCI_OP(write, word, u16, out_le16, 2) +MPC10X_PCI_OP(write, dword, u32, out_le32, 0) +#endif + +/* + * Read the memory controller registers to determine the amount of memory in + * the system. This assumes that the firmware has correctly set up the memory + * controller registers. + */ +unsigned long __init +mpc10x_get_mem_size(uint mem_map) +{ + uint *config_addr, *config_data, val; + ulong start, end, total, offset; + int i; + u_char bank_enables; + + switch (mem_map) { + case MPC10X_MEM_MAP_A: + config_addr = (uint *)MPC10X_MAPA_CNFG_ADDR; + config_data = (uint *)MPC10X_MAPA_CNFG_DATA; + break; + case MPC10X_MEM_MAP_B: + config_addr = (uint *)MPC10X_MAPB_CNFG_ADDR; + config_data = (uint *)MPC10X_MAPB_CNFG_DATA; + break; + default: + return 0; + } + + mpc10x_read_config_byte(config_addr, + config_data, + PCI_DEVFN(0,0), + MPC10X_MCTLR_MEM_BANK_ENABLES, + &bank_enables); + + total = 0; + + for (i=0; i<8; i++) { + if (bank_enables & (1 << i)) { + offset = MPC10X_MCTLR_MEM_START_1 + ((i > 3) ? 4 : 0); + mpc10x_read_config_dword(config_addr, + config_data, + PCI_DEVFN(0,0), + offset, + &val); + start = (val >> ((i & 3) << 3)) & 0xff; + + offset = MPC10X_MCTLR_EXT_MEM_START_1 + ((i>3) ? 4 : 0); + mpc10x_read_config_dword(config_addr, + config_data, + PCI_DEVFN(0,0), + offset, + &val); + val = (val >> ((i & 3) << 3)) & 0x03; + start = (val << 28) | (start << 20); + + offset = MPC10X_MCTLR_MEM_END_1 + ((i > 3) ? 4 : 0); + mpc10x_read_config_dword(config_addr, + config_data, + PCI_DEVFN(0,0), + offset, + &val); + end = (val >> ((i & 3) << 3)) & 0xff; + + offset = MPC10X_MCTLR_EXT_MEM_END_1 + ((i > 3) ? 4 : 0); + mpc10x_read_config_dword(config_addr, + config_data, + PCI_DEVFN(0,0), + offset, + &val); + val = (val >> ((i & 3) << 3)) & 0x03; + end = (val << 28) | (end << 20) | 0xfffff; + + total += (end - start + 1); + } + } + + return total; +} + +int __init +mpc10x_enable_store_gathering(struct pci_controller *hose) +{ + uint picr1; + + early_read_config_dword(hose, + 0, + PCI_DEVFN(0,0), + MPC10X_CFG_PICR1_REG, + &picr1); + + picr1 |= MPC10X_CFG_PICR1_ST_GATH_EN; + + early_write_config_dword(hose, + 0, + PCI_DEVFN(0,0), + MPC10X_CFG_PICR1_REG, + picr1); + + return 0; +} + +int __init +mpc10x_disable_store_gathering(struct pci_controller *hose) +{ + uint picr1; + + early_read_config_dword(hose, + 0, + PCI_DEVFN(0,0), + MPC10X_CFG_PICR1_REG, + &picr1); + + picr1 &= ~MPC10X_CFG_PICR1_ST_GATH_EN; + + early_write_config_dword(hose, + 0, + PCI_DEVFN(0,0), + MPC10X_CFG_PICR1_REG, + picr1); + + return 0; +} + +#ifdef CONFIG_MPC10X_OPENPIC +void __init mpc10x_set_openpic(void) +{ + /* Map external IRQs */ + openpic_set_sources(0, EPIC_IRQ_BASE, OpenPIC_Addr + 0x10200); + /* Skip reserved space and map i2c and DMA Ch[01] */ + openpic_set_sources(EPIC_IRQ_BASE, 3, OpenPIC_Addr + 0x11020); + /* Skip reserved space and map Message Unit Interrupt (I2O) */ + openpic_set_sources(EPIC_IRQ_BASE + 3, 1, OpenPIC_Addr + 0x110C0); + + openpic_init(NUM_8259_INTERRUPTS); +} +#endif |