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kernel-ark/arch/ppc/syslib/mpc10x_common.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

511 lines
13 KiB
C
Raw Blame History

/*
* 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
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