diff options
Diffstat (limited to 'arch/arm/mach-orion/pci.c')
| -rw-r--r-- | arch/arm/mach-orion/pci.c | 557 |
1 files changed, 0 insertions, 557 deletions
diff --git a/arch/arm/mach-orion/pci.c b/arch/arm/mach-orion/pci.c deleted file mode 100644 index b109bb46681e..000000000000 --- a/arch/arm/mach-orion/pci.c +++ /dev/null @@ -1,557 +0,0 @@ -/* - * arch/arm/mach-orion/pci.c - * - * PCI and PCIE functions for Marvell Orion System On Chip - * - * Maintainer: Tzachi Perelstein <tzachi@marvell.com> - * - * 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. - */ - -#include <linux/kernel.h> -#include <linux/pci.h> -#include <asm/mach/pci.h> -#include "common.h" - -/***************************************************************************** - * Orion has one PCIE controller and one PCI controller. - * - * Note1: The local PCIE bus number is '0'. The local PCI bus number - * follows the scanned PCIE bridged busses, if any. - * - * Note2: It is possible for PCI/PCIE agents to access many subsystem's - * space, by configuring BARs and Address Decode Windows, e.g. flashes on - * device bus, Orion registers, etc. However this code only enable the - * access to DDR banks. - ****************************************************************************/ - - -/***************************************************************************** - * PCIE controller - ****************************************************************************/ -#define PCIE_CTRL ORION_PCIE_REG(0x1a00) -#define PCIE_STAT ORION_PCIE_REG(0x1a04) -#define PCIE_DEV_ID ORION_PCIE_REG(0x0000) -#define PCIE_CMD_STAT ORION_PCIE_REG(0x0004) -#define PCIE_DEV_REV ORION_PCIE_REG(0x0008) -#define PCIE_MASK ORION_PCIE_REG(0x1910) -#define PCIE_CONF_ADDR ORION_PCIE_REG(0x18f8) -#define PCIE_CONF_DATA ORION_PCIE_REG(0x18fc) - -/* - * PCIE_STAT bits - */ -#define PCIE_STAT_LINK_DOWN 1 -#define PCIE_STAT_BUS_OFFS 8 -#define PCIE_STAT_BUS_MASK (0xff << PCIE_STAT_BUS_OFFS) -#define PCIE_STAT_DEV_OFFS 20 -#define PCIE_STAT_DEV_MASK (0x1f << PCIE_STAT_DEV_OFFS) - -/* - * PCIE_CONF_ADDR bits - */ -#define PCIE_CONF_REG(r) ((((r) & 0xf00) << 24) | ((r) & 0xfc)) -#define PCIE_CONF_FUNC(f) (((f) & 0x3) << 8) -#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 11) -#define PCIE_CONF_BUS(b) (((b) & 0xff) << 16) -#define PCIE_CONF_ADDR_EN (1 << 31) - -/* - * PCIE config cycles are done by programming the PCIE_CONF_ADDR register - * and then reading the PCIE_CONF_DATA register. Need to make sure these - * transactions are atomic. - */ -static DEFINE_SPINLOCK(orion_pcie_lock); - -void orion_pcie_id(u32 *dev, u32 *rev) -{ - *dev = orion_read(PCIE_DEV_ID) >> 16; - *rev = orion_read(PCIE_DEV_REV) & 0xff; -} - -u32 orion_pcie_local_bus_nr(void) -{ - u32 stat = orion_read(PCIE_STAT); - return((stat & PCIE_STAT_BUS_MASK) >> PCIE_STAT_BUS_OFFS); -} - -static u32 orion_pcie_local_dev_nr(void) -{ - u32 stat = orion_read(PCIE_STAT); - return((stat & PCIE_STAT_DEV_MASK) >> PCIE_STAT_DEV_OFFS); -} - -static u32 orion_pcie_no_link(void) -{ - u32 stat = orion_read(PCIE_STAT); - return(stat & PCIE_STAT_LINK_DOWN); -} - -static void orion_pcie_set_bus_nr(int nr) -{ - orion_clrbits(PCIE_STAT, PCIE_STAT_BUS_MASK); - orion_setbits(PCIE_STAT, nr << PCIE_STAT_BUS_OFFS); -} - -static void orion_pcie_master_slave_enable(void) -{ - orion_setbits(PCIE_CMD_STAT, PCI_COMMAND_MASTER | - PCI_COMMAND_IO | - PCI_COMMAND_MEMORY); -} - -static void orion_pcie_enable_interrupts(void) -{ - /* - * Enable interrupts lines - * INTA[24] INTB[25] INTC[26] INTD[27] - */ - orion_setbits(PCIE_MASK, 0xf<<24); -} - -static int orion_pcie_valid_config(u32 bus, u32 dev) -{ - /* - * Don't go out when trying to access -- - * 1. our own device - * 2. where there's no device connected (no link) - * 3. nonexisting devices on local bus - */ - - if ((orion_pcie_local_bus_nr() == bus) && - (orion_pcie_local_dev_nr() == dev)) - return 0; - - if (orion_pcie_no_link()) - return 0; - - if (bus == orion_pcie_local_bus_nr()) - if (((orion_pcie_local_dev_nr() == 0) && (dev != 1)) || - ((orion_pcie_local_dev_nr() != 0) && (dev != 0))) - return 0; - - return 1; -} - -static int orion_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where, - int size, u32 *val) -{ - unsigned long flags; - unsigned int dev, rev, pcie_addr; - - if (orion_pcie_valid_config(bus->number, PCI_SLOT(devfn)) == 0) { - *val = 0xffffffff; - return PCIBIOS_DEVICE_NOT_FOUND; - } - - spin_lock_irqsave(&orion_pcie_lock, flags); - - orion_write(PCIE_CONF_ADDR, PCIE_CONF_BUS(bus->number) | - PCIE_CONF_DEV(PCI_SLOT(devfn)) | - PCIE_CONF_FUNC(PCI_FUNC(devfn)) | - PCIE_CONF_REG(where) | PCIE_CONF_ADDR_EN); - - orion_pcie_id(&dev, &rev); - if (dev == MV88F5181_DEV_ID || dev == MV88F5182_DEV_ID) { - /* extended register space */ - pcie_addr = ORION_PCIE_WA_VIRT_BASE; - pcie_addr |= PCIE_CONF_BUS(bus->number) | - PCIE_CONF_DEV(PCI_SLOT(devfn)) | - PCIE_CONF_FUNC(PCI_FUNC(devfn)) | - PCIE_CONF_REG(where); - *val = orion_read(pcie_addr); - } else - *val = orion_read(PCIE_CONF_DATA); - - if (size == 1) - *val = (*val >> (8*(where & 0x3))) & 0xff; - else if (size == 2) - *val = (*val >> (8*(where & 0x3))) & 0xffff; - - spin_unlock_irqrestore(&orion_pcie_lock, flags); - - return PCIBIOS_SUCCESSFUL; -} - - -static int orion_pcie_wr_conf(struct pci_bus *bus, u32 devfn, int where, - int size, u32 val) -{ - unsigned long flags; - int ret; - - if (orion_pcie_valid_config(bus->number, PCI_SLOT(devfn)) == 0) - return PCIBIOS_DEVICE_NOT_FOUND; - - spin_lock_irqsave(&orion_pcie_lock, flags); - - ret = PCIBIOS_SUCCESSFUL; - - orion_write(PCIE_CONF_ADDR, PCIE_CONF_BUS(bus->number) | - PCIE_CONF_DEV(PCI_SLOT(devfn)) | - PCIE_CONF_FUNC(PCI_FUNC(devfn)) | - PCIE_CONF_REG(where) | PCIE_CONF_ADDR_EN); - - if (size == 4) { - __raw_writel(val, PCIE_CONF_DATA); - } else if (size == 2) { - __raw_writew(val, PCIE_CONF_DATA + (where & 0x3)); - } else if (size == 1) { - __raw_writeb(val, PCIE_CONF_DATA + (where & 0x3)); - } else { - ret = PCIBIOS_BAD_REGISTER_NUMBER; - } - - spin_unlock_irqrestore(&orion_pcie_lock, flags); - - return ret; -} - -struct pci_ops orion_pcie_ops = { - .read = orion_pcie_rd_conf, - .write = orion_pcie_wr_conf, -}; - - -static int orion_pcie_setup(struct pci_sys_data *sys) -{ - struct resource *res; - - /* - * Master + Slave enable - */ - orion_pcie_master_slave_enable(); - - /* - * Enable interrupts lines A-D - */ - orion_pcie_enable_interrupts(); - - /* - * Request resource - */ - res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL); - if (!res) - panic("orion_pci_setup unable to alloc resources"); - - /* - * IORESOURCE_IO - */ - res[0].name = "PCI-EX I/O Space"; - res[0].flags = IORESOURCE_IO; - res[0].start = ORION_PCIE_IO_BUS_BASE; - res[0].end = res[0].start + ORION_PCIE_IO_SIZE - 1; - if (request_resource(&ioport_resource, &res[0])) - panic("Request PCIE IO resource failed\n"); - sys->resource[0] = &res[0]; - - /* - * IORESOURCE_MEM - */ - res[1].name = "PCI-EX Memory Space"; - res[1].flags = IORESOURCE_MEM; - res[1].start = ORION_PCIE_MEM_PHYS_BASE; - res[1].end = res[1].start + ORION_PCIE_MEM_SIZE - 1; - if (request_resource(&iomem_resource, &res[1])) - panic("Request PCIE Memory resource failed\n"); - sys->resource[1] = &res[1]; - - sys->resource[2] = NULL; - sys->io_offset = 0; - - return 1; -} - -/***************************************************************************** - * PCI controller - ****************************************************************************/ -#define PCI_MODE ORION_PCI_REG(0xd00) -#define PCI_CMD ORION_PCI_REG(0xc00) -#define PCI_P2P_CONF ORION_PCI_REG(0x1d14) -#define PCI_CONF_ADDR ORION_PCI_REG(0xc78) -#define PCI_CONF_DATA ORION_PCI_REG(0xc7c) - -/* - * PCI_MODE bits - */ -#define PCI_MODE_64BIT (1 << 2) -#define PCI_MODE_PCIX ((1 << 4) | (1 << 5)) - -/* - * PCI_CMD bits - */ -#define PCI_CMD_HOST_REORDER (1 << 29) - -/* - * PCI_P2P_CONF bits - */ -#define PCI_P2P_BUS_OFFS 16 -#define PCI_P2P_BUS_MASK (0xff << PCI_P2P_BUS_OFFS) -#define PCI_P2P_DEV_OFFS 24 -#define PCI_P2P_DEV_MASK (0x1f << PCI_P2P_DEV_OFFS) - -/* - * PCI_CONF_ADDR bits - */ -#define PCI_CONF_REG(reg) ((reg) & 0xfc) -#define PCI_CONF_FUNC(func) (((func) & 0x3) << 8) -#define PCI_CONF_DEV(dev) (((dev) & 0x1f) << 11) -#define PCI_CONF_BUS(bus) (((bus) & 0xff) << 16) -#define PCI_CONF_ADDR_EN (1 << 31) - -/* - * Internal configuration space - */ -#define PCI_CONF_FUNC_STAT_CMD 0 -#define PCI_CONF_REG_STAT_CMD 4 -#define PCIX_STAT 0x64 -#define PCIX_STAT_BUS_OFFS 8 -#define PCIX_STAT_BUS_MASK (0xff << PCIX_STAT_BUS_OFFS) - -/* - * PCI config cycles are done by programming the PCI_CONF_ADDR register - * and then reading the PCI_CONF_DATA register. Need to make sure these - * transactions are atomic. - */ -static DEFINE_SPINLOCK(orion_pci_lock); - -u32 orion_pci_local_bus_nr(void) -{ - u32 conf = orion_read(PCI_P2P_CONF); - return((conf & PCI_P2P_BUS_MASK) >> PCI_P2P_BUS_OFFS); -} - -u32 orion_pci_local_dev_nr(void) -{ - u32 conf = orion_read(PCI_P2P_CONF); - return((conf & PCI_P2P_DEV_MASK) >> PCI_P2P_DEV_OFFS); -} - -int orion_pci_hw_rd_conf(u32 bus, u32 dev, u32 func, - u32 where, u32 size, u32 *val) -{ - unsigned long flags; - spin_lock_irqsave(&orion_pci_lock, flags); - - orion_write(PCI_CONF_ADDR, PCI_CONF_BUS(bus) | - PCI_CONF_DEV(dev) | PCI_CONF_REG(where) | - PCI_CONF_FUNC(func) | PCI_CONF_ADDR_EN); - - *val = orion_read(PCI_CONF_DATA); - - if (size == 1) - *val = (*val >> (8*(where & 0x3))) & 0xff; - else if (size == 2) - *val = (*val >> (8*(where & 0x3))) & 0xffff; - - spin_unlock_irqrestore(&orion_pci_lock, flags); - - return PCIBIOS_SUCCESSFUL; -} - -int orion_pci_hw_wr_conf(u32 bus, u32 dev, u32 func, - u32 where, u32 size, u32 val) -{ - unsigned long flags; - int ret = PCIBIOS_SUCCESSFUL; - - spin_lock_irqsave(&orion_pci_lock, flags); - - orion_write(PCI_CONF_ADDR, PCI_CONF_BUS(bus) | - PCI_CONF_DEV(dev) | PCI_CONF_REG(where) | - PCI_CONF_FUNC(func) | PCI_CONF_ADDR_EN); - - if (size == 4) { - __raw_writel(val, PCI_CONF_DATA); - } else if (size == 2) { - __raw_writew(val, PCI_CONF_DATA + (where & 0x3)); - } else if (size == 1) { - __raw_writeb(val, PCI_CONF_DATA + (where & 0x3)); - } else { - ret = PCIBIOS_BAD_REGISTER_NUMBER; - } - - spin_unlock_irqrestore(&orion_pci_lock, flags); - - return ret; -} - -static int orion_pci_rd_conf(struct pci_bus *bus, u32 devfn, - int where, int size, u32 *val) -{ - /* - * Don't go out for local device - */ - if ((orion_pci_local_bus_nr() == bus->number) && - (orion_pci_local_dev_nr() == PCI_SLOT(devfn))) { - *val = 0xffffffff; - return PCIBIOS_DEVICE_NOT_FOUND; - } - - return orion_pci_hw_rd_conf(bus->number, PCI_SLOT(devfn), - PCI_FUNC(devfn), where, size, val); -} - -static int orion_pci_wr_conf(struct pci_bus *bus, u32 devfn, - int where, int size, u32 val) -{ - /* - * Don't go out for local device - */ - if ((orion_pci_local_bus_nr() == bus->number) && - (orion_pci_local_dev_nr() == PCI_SLOT(devfn))) - return PCIBIOS_DEVICE_NOT_FOUND; - - return orion_pci_hw_wr_conf(bus->number, PCI_SLOT(devfn), - PCI_FUNC(devfn), where, size, val); -} - -struct pci_ops orion_pci_ops = { - .read = orion_pci_rd_conf, - .write = orion_pci_wr_conf, -}; - -static void orion_pci_set_bus_nr(int nr) -{ - u32 p2p = orion_read(PCI_P2P_CONF); - - if (orion_read(PCI_MODE) & PCI_MODE_PCIX) { - /* - * PCI-X mode - */ - u32 pcix_status, bus, dev; - bus = (p2p & PCI_P2P_BUS_MASK) >> PCI_P2P_BUS_OFFS; - dev = (p2p & PCI_P2P_DEV_MASK) >> PCI_P2P_DEV_OFFS; - orion_pci_hw_rd_conf(bus, dev, 0, PCIX_STAT, 4, &pcix_status); - pcix_status &= ~PCIX_STAT_BUS_MASK; - pcix_status |= (nr << PCIX_STAT_BUS_OFFS); - orion_pci_hw_wr_conf(bus, dev, 0, PCIX_STAT, 4, pcix_status); - } else { - /* - * PCI Conventional mode - */ - p2p &= ~PCI_P2P_BUS_MASK; - p2p |= (nr << PCI_P2P_BUS_OFFS); - orion_write(PCI_P2P_CONF, p2p); - } -} - -static void orion_pci_master_slave_enable(void) -{ - u32 bus_nr, dev_nr, func, reg, val; - - bus_nr = orion_pci_local_bus_nr(); - dev_nr = orion_pci_local_dev_nr(); - func = PCI_CONF_FUNC_STAT_CMD; - reg = PCI_CONF_REG_STAT_CMD; - orion_pci_hw_rd_conf(bus_nr, dev_nr, func, reg, 4, &val); - val |= (PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); - orion_pci_hw_wr_conf(bus_nr, dev_nr, func, reg, 4, val | 0x7); -} - -static int orion_pci_setup(struct pci_sys_data *sys) -{ - struct resource *res; - - /* - * Master + Slave enable - */ - orion_pci_master_slave_enable(); - - /* - * Force ordering - */ - orion_setbits(PCI_CMD, PCI_CMD_HOST_REORDER); - - /* - * Request resources - */ - res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL); - if (!res) - panic("orion_pci_setup unable to alloc resources"); - - /* - * IORESOURCE_IO - */ - res[0].name = "PCI I/O Space"; - res[0].flags = IORESOURCE_IO; - res[0].start = ORION_PCI_IO_BUS_BASE; - res[0].end = res[0].start + ORION_PCI_IO_SIZE - 1; - if (request_resource(&ioport_resource, &res[0])) - panic("Request PCI IO resource failed\n"); - sys->resource[0] = &res[0]; - - /* - * IORESOURCE_MEM - */ - res[1].name = "PCI Memory Space"; - res[1].flags = IORESOURCE_MEM; - res[1].start = ORION_PCI_MEM_PHYS_BASE; - res[1].end = res[1].start + ORION_PCI_MEM_SIZE - 1; - if (request_resource(&iomem_resource, &res[1])) - panic("Request PCI Memory resource failed\n"); - sys->resource[1] = &res[1]; - - sys->resource[2] = NULL; - sys->io_offset = 0; - - return 1; -} - - -/***************************************************************************** - * General PCIE + PCI - ****************************************************************************/ -int orion_pci_sys_setup(int nr, struct pci_sys_data *sys) -{ - int ret = 0; - - if (nr == 0) { - /* - * PCIE setup - */ - orion_pcie_set_bus_nr(0); - ret = orion_pcie_setup(sys); - } else if (nr == 1) { - /* - * PCI setup - */ - ret = orion_pci_setup(sys); - } - - return ret; -} - -struct pci_bus *orion_pci_sys_scan_bus(int nr, struct pci_sys_data *sys) -{ - struct pci_ops *ops; - struct pci_bus *bus; - - - if (nr == 0) { - u32 pci_bus; - /* - * PCIE scan - */ - ops = &orion_pcie_ops; - bus = pci_scan_bus(sys->busnr, ops, sys); - /* - * Set local PCI bus number to follow PCIE bridges (if any) - */ - pci_bus = bus->number + bus->subordinate - bus->secondary + 1; - orion_pci_set_bus_nr(pci_bus); - } else if (nr == 1) { - /* - * PCI scan - */ - ops = &orion_pci_ops; - bus = pci_scan_bus(sys->busnr, ops, sys); - } else { - BUG(); - bus = NULL; - } - - return bus; -} |