diff options
author | Ralf Baechle <ralf@linux-mips.org> | 2008-07-16 15:12:25 (GMT) |
---|---|---|
committer | Ralf Baechle <ralf@linux-mips.org> | 2008-07-20 13:38:18 (GMT) |
commit | 73b4390fb23456964201abda79f1210fe337d01a (patch) | |
tree | bc613dfa0a3926bd889025cebbc28ae034b8c854 /arch/mips/pci | |
parent | 36a0a3cd45b49ceff78ac28efef1cbeec413d8c2 (diff) | |
download | linux-73b4390fb23456964201abda79f1210fe337d01a.tar.xz |
[MIPS] Routerboard 532: Support for base system
Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/pci')
-rw-r--r-- | arch/mips/pci/Makefile | 1 | ||||
-rw-r--r-- | arch/mips/pci/fixup-rc32434.c | 69 | ||||
-rw-r--r-- | arch/mips/pci/ops-rc32434.c | 207 | ||||
-rw-r--r-- | arch/mips/pci/pci-rc32434.c | 221 |
4 files changed, 498 insertions, 0 deletions
diff --git a/arch/mips/pci/Makefile b/arch/mips/pci/Makefile index 57e34ca..15e01ae 100644 --- a/arch/mips/pci/Makefile +++ b/arch/mips/pci/Makefile @@ -49,3 +49,4 @@ obj-$(CONFIG_TOSHIBA_RBTX4938) += fixup-rbtx4938.o obj-$(CONFIG_VICTOR_MPC30X) += fixup-mpc30x.o obj-$(CONFIG_ZAO_CAPCELLA) += fixup-capcella.o obj-$(CONFIG_WR_PPMC) += fixup-wrppmc.o +obj-$(CONFIG_MIKROTIK_RB532) += pci-rc32434.o ops-rc32434.o fixup-rc32434.o diff --git a/arch/mips/pci/fixup-rc32434.c b/arch/mips/pci/fixup-rc32434.c new file mode 100644 index 0000000..75b90dc --- /dev/null +++ b/arch/mips/pci/fixup-rc32434.c @@ -0,0 +1,69 @@ +/* + * Copyright 2001 MontaVista Software Inc. + * Author: MontaVista Software, Inc. + * stevel@mvista.com or source@mvista.com + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/kernel.h> +#include <linux/init.h> + +#include <asm/mach-rc32434/rc32434.h> + +static int __devinitdata irq_map[2][12] = { + {0, 0, 2, 3, 2, 3, 0, 0, 0, 0, 0, 1}, + {0, 0, 1, 3, 0, 2, 1, 3, 0, 2, 1, 3} +}; + +int __devinit pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + int irq = 0; + + if (dev->bus->number < 2 && PCI_SLOT(dev->devfn) < 12) + irq = irq_map[dev->bus->number][PCI_SLOT(dev->devfn)]; + + return irq + GROUP4_IRQ_BASE + 4; +} + +static void rc32434_pci_early_fixup(struct pci_dev *dev) +{ + if (PCI_SLOT(dev->devfn) == 6 && dev->bus->number == 0) { + /* disable prefetched memory range */ + pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, 0); + pci_write_config_word(dev, PCI_PREF_MEMORY_BASE, 0x10); + + pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 4); + } +} + +/* + * The fixup applies to both the IDT and VIA devices present on the board + */ +DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, rc32434_pci_early_fixup); + +/* Do platform specific device initialization at pci_enable_device() time */ +int pcibios_plat_dev_init(struct pci_dev *dev) +{ + return 0; +} diff --git a/arch/mips/pci/ops-rc32434.c b/arch/mips/pci/ops-rc32434.c new file mode 100644 index 0000000..d1f8fa2 --- /dev/null +++ b/arch/mips/pci/ops-rc32434.c @@ -0,0 +1,207 @@ +/* + * BRIEF MODULE DESCRIPTION + * pci_ops for IDT EB434 board + * + * Copyright 2004 IDT Inc. (rischelp@idt.com) + * Copyright 2006 Felix Fietkau <nbd@openwrt.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/pci.h> +#include <linux/types.h> + +#include <asm/cpu.h> +#include <asm/mach-rc32434/rc32434.h> +#include <asm/mach-rc32434/pci.h> + +#define PCI_ACCESS_READ 0 +#define PCI_ACCESS_WRITE 1 + + +#define PCI_CFG_SET(bus, slot, func, off) \ + (rc32434_pci->pcicfga = (0x80000000 | \ + ((bus) << 16) | ((slot)<<11) | \ + ((func)<<8) | (off))) + +static inline int config_access(unsigned char access_type, + struct pci_bus *bus, unsigned int devfn, + unsigned char where, u32 *data) +{ + unsigned int slot = PCI_SLOT(devfn); + u8 func = PCI_FUNC(devfn); + + /* Setup address */ + PCI_CFG_SET(bus->number, slot, func, where); + rc32434_sync(); + + if (access_type == PCI_ACCESS_WRITE) + rc32434_pci->pcicfgd = *data; + else + *data = rc32434_pci->pcicfgd; + + rc32434_sync(); + + return 0; +} + + +/* + * We can't address 8 and 16 bit words directly. Instead we have to + * read/write a 32bit word and mask/modify the data we actually want. + */ +static int read_config_byte(struct pci_bus *bus, unsigned int devfn, + int where, u8 *val) +{ + u32 data; + int ret; + + ret = config_access(PCI_ACCESS_READ, bus, devfn, where, &data); + *val = (data >> ((where & 3) << 3)) & 0xff; + return ret; +} + +static int read_config_word(struct pci_bus *bus, unsigned int devfn, + int where, u16 *val) +{ + u32 data; + int ret; + + ret = config_access(PCI_ACCESS_READ, bus, devfn, where, &data); + *val = (data >> ((where & 3) << 3)) & 0xffff; + return ret; +} + +static int read_config_dword(struct pci_bus *bus, unsigned int devfn, + int where, u32 *val) +{ + int ret; + int delay = 1; + + /* + * Don't scan too far, else there will be errors with plugged in + * daughterboard (rb564). + */ + if (bus->number == 0 && PCI_SLOT(devfn) > 21) + return 0; + +retry: + ret = config_access(PCI_ACCESS_READ, bus, devfn, where, val); + + /* + * Certain devices react delayed at device scan time, this + * gives them time to settle + */ + if (where == PCI_VENDOR_ID) { + if (ret == 0xffffffff || ret == 0x00000000 || + ret == 0x0000ffff || ret == 0xffff0000) { + if (delay > 4) + return 0; + delay *= 2; + msleep(delay); + goto retry; + } + } + + return ret; +} + +static int +write_config_byte(struct pci_bus *bus, unsigned int devfn, int where, + u8 val) +{ + u32 data = 0; + + if (config_access(PCI_ACCESS_READ, bus, devfn, where, &data)) + return -1; + + data = (data & ~(0xff << ((where & 3) << 3))) | + (val << ((where & 3) << 3)); + + if (config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data)) + return -1; + + return PCIBIOS_SUCCESSFUL; +} + + +static int +write_config_word(struct pci_bus *bus, unsigned int devfn, int where, + u16 val) +{ + u32 data = 0; + + if (config_access(PCI_ACCESS_READ, bus, devfn, where, &data)) + return -1; + + data = (data & ~(0xffff << ((where & 3) << 3))) | + (val << ((where & 3) << 3)); + + if (config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data)) + return -1; + + + return PCIBIOS_SUCCESSFUL; +} + + +static int +write_config_dword(struct pci_bus *bus, unsigned int devfn, int where, + u32 val) +{ + if (config_access(PCI_ACCESS_WRITE, bus, devfn, where, &val)) + return -1; + + return PCIBIOS_SUCCESSFUL; +} + +static int pci_config_read(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val) +{ + switch (size) { + case 1: + return read_config_byte(bus, devfn, where, (u8 *) val); + case 2: + return read_config_word(bus, devfn, where, (u16 *) val); + default: + return read_config_dword(bus, devfn, where, val); + } +} + +static int pci_config_write(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 val) +{ + switch (size) { + case 1: + return write_config_byte(bus, devfn, where, (u8) val); + case 2: + return write_config_word(bus, devfn, where, (u16) val); + default: + return write_config_dword(bus, devfn, where, val); + } +} + +struct pci_ops rc32434_pci_ops = { + .read = pci_config_read, + .write = pci_config_write, +}; diff --git a/arch/mips/pci/pci-rc32434.c b/arch/mips/pci/pci-rc32434.c new file mode 100644 index 0000000..1c2821e --- /dev/null +++ b/arch/mips/pci/pci-rc32434.c @@ -0,0 +1,221 @@ +/* + * BRIEF MODULE DESCRIPTION + * PCI initialization for IDT EB434 board + * + * Copyright 2004 IDT Inc. (rischelp@idt.com) + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/kernel.h> +#include <linux/init.h> + +#include <asm/mach-rc32434/rc32434.h> +#include <asm/mach-rc32434/pci.h> + +#define PCI_ACCESS_READ 0 +#define PCI_ACCESS_WRITE 1 + +/* define an unsigned array for the PCI registers */ +static unsigned int korina_cnfg_regs[25] = { + KORINA_CNFG1, KORINA_CNFG2, KORINA_CNFG3, KORINA_CNFG4, + KORINA_CNFG5, KORINA_CNFG6, KORINA_CNFG7, KORINA_CNFG8, + KORINA_CNFG9, KORINA_CNFG10, KORINA_CNFG11, KORINA_CNFG12, + KORINA_CNFG13, KORINA_CNFG14, KORINA_CNFG15, KORINA_CNFG16, + KORINA_CNFG17, KORINA_CNFG18, KORINA_CNFG19, KORINA_CNFG20, + KORINA_CNFG21, KORINA_CNFG22, KORINA_CNFG23, KORINA_CNFG24 +}; +static struct resource rc32434_res_pci_mem1; +static struct resource rc32434_res_pci_mem2; + +static struct resource rc32434_res_pci_mem1 = { + .name = "PCI MEM1", + .start = 0x50000000, + .end = 0x5FFFFFFF, + .flags = IORESOURCE_MEM, + .parent = &rc32434_res_pci_mem1, + .sibling = NULL, + .child = &rc32434_res_pci_mem2 +}; + +static struct resource rc32434_res_pci_mem2 = { + .name = "PCI Mem2", + .start = 0x60000000, + .end = 0x6FFFFFFF, + .flags = IORESOURCE_MEM, + .parent = &rc32434_res_pci_mem1, + .sibling = NULL, + .child = NULL +}; + +static struct resource rc32434_res_pci_io1 = { + .name = "PCI I/O1", + .start = 0x18800000, + .end = 0x188FFFFF, + .flags = IORESOURCE_IO, +}; + +extern struct pci_ops rc32434_pci_ops; + +#define PCI_MEM1_START PCI_ADDR_START +#define PCI_MEM1_END (PCI_ADDR_START + CPUTOPCI_MEM_WIN - 1) +#define PCI_MEM2_START (PCI_ADDR_START + CPUTOPCI_MEM_WIN) +#define PCI_MEM2_END (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) - 1) +#define PCI_IO1_START (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN)) +#define PCI_IO1_END \ + (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + CPUTOPCI_IO_WIN - 1) +#define PCI_IO2_START \ + (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + CPUTOPCI_IO_WIN) +#define PCI_IO2_END \ + (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + (2 * CPUTOPCI_IO_WIN) - 1) + +struct pci_controller rc32434_controller2; + +struct pci_controller rc32434_controller = { + .pci_ops = &rc32434_pci_ops, + .mem_resource = &rc32434_res_pci_mem1, + .io_resource = &rc32434_res_pci_io1, + .mem_offset = 0, + .io_offset = 0, + +}; + +#ifdef __MIPSEB__ +#define PCI_ENDIAN_FLAG PCILBAC_sb_m +#else +#define PCI_ENDIAN_FLAG 0 +#endif + +static int __init rc32434_pcibridge_init(void) +{ + unsigned int pcicvalue, pcicdata = 0; + unsigned int dummyread, pcicntlval; + int loopCount; + unsigned int pci_config_addr; + + pcicvalue = rc32434_pci->pcic; + pcicvalue = (pcicvalue >> PCIM_SHFT) & PCIM_BIT_LEN; + if (!((pcicvalue == PCIM_H_EA) || + (pcicvalue == PCIM_H_IA_FIX) || + (pcicvalue == PCIM_H_IA_RR))) { + pr_err(KERN_ERR "PCI init error!!!\n"); + /* Not in Host Mode, return ERROR */ + return -1; + } + /* Enables the Idle Grant mode, Arbiter Parking */ + pcicdata |= (PCI_CTL_IGM | PCI_CTL_EAP | PCI_CTL_EN); + rc32434_pci->pcic = pcicdata; /* Enable the PCI bus Interface */ + /* Zero out the PCI status & PCI Status Mask */ + for (;;) { + pcicdata = rc32434_pci->pcis; + if (!(pcicdata & PCI_STAT_RIP)) + break; + } + + rc32434_pci->pcis = 0; + rc32434_pci->pcism = 0xFFFFFFFF; + /* Zero out the PCI decoupled registers */ + rc32434_pci->pcidac = 0; /* + * disable PCI decoupled accesses at + * initialization + */ + rc32434_pci->pcidas = 0; /* clear the status */ + rc32434_pci->pcidasm = 0x0000007F; /* Mask all the interrupts */ + /* Mask PCI Messaging Interrupts */ + rc32434_pci_msg->pciiic = 0; + rc32434_pci_msg->pciiim = 0xFFFFFFFF; + rc32434_pci_msg->pciioic = 0; + rc32434_pci_msg->pciioim = 0; + + + /* Setup PCILB0 as Memory Window */ + rc32434_pci->pcilba[0].address = (unsigned int) (PCI_ADDR_START); + + /* setup the PCI map address as same as the local address */ + + rc32434_pci->pcilba[0].mapping = (unsigned int) (PCI_ADDR_START); + + + /* Setup PCILBA1 as MEM */ + rc32434_pci->pcilba[0].control = + (((SIZE_256MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG); + dummyread = rc32434_pci->pcilba[0].control; /* flush the CPU write Buffers */ + rc32434_pci->pcilba[1].address = 0x60000000; + rc32434_pci->pcilba[1].mapping = 0x60000000; + + /* setup PCILBA2 as IO Window */ + rc32434_pci->pcilba[1].control = + (((SIZE_256MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG); + dummyread = rc32434_pci->pcilba[1].control; /* flush the CPU write Buffers */ + rc32434_pci->pcilba[2].address = 0x18C00000; + rc32434_pci->pcilba[2].mapping = 0x18FFFFFF; + + /* setup PCILBA2 as IO Window */ + rc32434_pci->pcilba[2].control = + (((SIZE_4MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG); + dummyread = rc32434_pci->pcilba[2].control; /* flush the CPU write Buffers */ + + /* Setup PCILBA3 as IO Window */ + rc32434_pci->pcilba[3].address = 0x18800000; + rc32434_pci->pcilba[3].mapping = 0x18800000; + rc32434_pci->pcilba[3].control = + ((((SIZE_1MB & 0x1ff) << PCI_LBAC_SIZE_BIT) | PCI_LBAC_MSI) | + PCI_ENDIAN_FLAG); + dummyread = rc32434_pci->pcilba[3].control; /* flush the CPU write Buffers */ + + pci_config_addr = (unsigned int) (0x80000004); + for (loopCount = 0; loopCount < 24; loopCount++) { + rc32434_pci->pcicfga = pci_config_addr; + dummyread = rc32434_pci->pcicfga; + rc32434_pci->pcicfgd = korina_cnfg_regs[loopCount]; + dummyread = rc32434_pci->pcicfgd; + pci_config_addr += 4; + } + rc32434_pci->pcitc = + (unsigned int) ((PCITC_RTIMER_VAL & 0xff) << PCI_TC_RTIMER_BIT) | + ((PCITC_DTIMER_VAL & 0xff) << PCI_TC_DTIMER_BIT); + + pcicntlval = rc32434_pci->pcic; + pcicntlval &= ~PCI_CTL_TNR; + rc32434_pci->pcic = pcicntlval; + pcicntlval = rc32434_pci->pcic; + + return 0; +} + +static int __init rc32434_pci_init(void) +{ + pr_info("PCI: Initializing PCI\n"); + + ioport_resource.start = rc32434_res_pci_io1.start; + ioport_resource.end = rc32434_res_pci_io1.end; + + rc32434_pcibridge_init(); + + register_pci_controller(&rc32434_controller); + rc32434_sync(); + + return 0; +} + +arch_initcall(rc32434_pci_init); |