/* pci_fire.c: Sun4u platform PCI-E controller support.
*
* Copyright (C) 2007 David S. Miller (davem@davemloft.net)
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <asm/pbm.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include "pci_impl.h"
#define fire_read(__reg) \
({ u64 __ret; \
__asm__ __volatile__("ldxa [%1] %2, %0" \
: "=r" (__ret) \
: "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
: "memory"); \
__ret; \
})
#define fire_write(__reg, __val) \
__asm__ __volatile__("stxa %0, [%1] %2" \
: /* no outputs */ \
: "r" (__val), "r" (__reg), \
"i" (ASI_PHYS_BYPASS_EC_E) \
: "memory")
/* Fire config space address format is nearly identical to
* that of SCHIZO and PSYCHO, except that in order to accomodate
* PCI-E extended config space the encoding can handle 12 bits
* of register address:
*
* 32 28 27 20 19 15 14 12 11 2 1 0
* -------------------------------------------------
* |0 0 0 0 0| bus | device | function | reg | 0 0 |
* -------------------------------------------------
*/
#define FIRE_CONFIG_BASE(PBM) ((PBM)->config_space)
#define FIRE_CONFIG_ENCODE(BUS, DEVFN, REG) \
(((unsigned long)(BUS) << 20) | \
((unsigned long)(DEVFN) << 12) | \
((unsigned long)(REG)))
static void *fire_pci_config_mkaddr(struct pci_pbm_info *pbm,
unsigned char bus,
unsigned int devfn,
int where)
{
if (!pbm)
return NULL;
return (void *)
(FIRE_CONFIG_BASE(pbm) |
FIRE_CONFIG_ENCODE(bus, devfn, where));
}
/* FIRE PCI configuration space accessors. */
static int fire_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
int where, int size, u32 *value)
{
struct pci_pbm_info *pbm = bus_dev->sysdata;
unsigned char bus = bus_dev->number;
u32 *addr;
u16 tmp16;
u8 tmp8;
if (bus_dev == pbm->pci_bus && devfn == 0x00)
return pci_host_bridge_read_pci_cfg(bus_dev, devfn, where,
size, value);
switch (size) {
case 1:
*value = 0xff;
break;
case 2:
*value = 0xffff;
break;
case 4:
*value = 0xffffffff;
break;
}
addr = fire_pci_config_mkaddr(pbm, bus, devfn, where);
if (!addr)
return PCIBIOS_SUCCESSFUL;
switch (size) {
case 1:
pci_config_read8((u8 *)addr, &tmp8);
*value = tmp8;
break;
case 2:
if (where & 0x01) {
printk("pci_read_config_word: misaligned reg [%x]\n",
where);
return PCIBIOS_SUCCESSFUL;
}
pci_config_read16((u16 *)addr, &tmp16);
*value = tmp16;
break;
case 4:
if (where & 0x03) {
printk("pci_read_config_dword: misaligned reg [%x]\n",
where);
return PCIBIOS_SUCCESSFUL;
}
pci_config_read32(addr, value);
break;
}
return PCIBIOS_SUCCESSFUL;
}
static int fire_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
int where, int size, u32 value)
{
struct pci_pbm_info *pbm = bus_dev->sysdata;
unsigned char bus = bus_dev->number;
u32 *addr;
if (bus_dev == pbm->pci_bus && devfn == 0x00)
return pci_host_bridge_write_pci_cfg(bus_dev, devfn, where,
size, value);
addr = fire_pci_config_mkaddr(pbm, bus, devfn, where);
if (!addr)
return PCIBIOS_SUCCESSFUL;
switch (size) {
case 1:
pci_config_write8((u8 *)addr, value);
break;
case 2:
if (where & 0x01) {
printk("pci_write_config_word: misaligned reg [%x]\n",
where);
return PCIBIOS_SUCCESSFUL;
}
pci_config_write16((u16 *)addr, value);
break;
case 4:
if (where & 0x03) {
printk("pci_write_config_dword: misaligned reg [%x]\n",
where);
return PCIBIOS_SUCCESSFUL;
}
pci_config_write32(addr, value);
}
return PCIBIOS_SUCCESSFUL;
}
static struct pci_ops pci_fire_ops = {
.read = fire_read_pci_cfg,
.write = fire_write_pci_cfg,
};
static void pci_fire_scan_bus(struct pci_pbm_info *pbm)
{
pbm->pci_bus = pci_scan_one_pbm(pbm);
/* XXX register error interrupt handlers XXX */
}
#define FIRE_IOMMU_CONTROL 0x40000UL
#define FIRE_IOMMU_TSBBASE 0x40008UL
#define FIRE_IOMMU_FLUSH 0x40100UL
#define FIRE_IOMMU_FLUSHINV 0x40100UL
static void pci_fire_pbm_iommu_init(struct pci_pbm_info *pbm)
{
struct iommu *iommu = pbm->iommu;
u32 vdma[2], dma_mask;
u64 control;
int tsbsize;
/* No virtual-dma property on these guys, use largest size. */
vdma[0] = 0xc0000000; /* base */
vdma[1] = 0x40000000; /* size */
dma_mask = 0xffffffff;
tsbsize = 128;
/* Register addresses. */
iommu->iommu_control = pbm->pbm_regs + FIRE_IOMMU_CONTROL;
iommu->iommu_tsbbase = pbm->pbm_regs + FIRE_IOMMU_TSBBASE;
iommu->iommu_flush = pbm->pbm_regs + FIRE_IOMMU_FLUSH;
iommu->iommu_flushinv = pbm->pbm_regs + FIRE_IOMMU_FLUSHINV;
/* We use the main control/status register of FIRE as the write
* completion register.
*/
iommu->write_complete_reg = pbm->controller_regs + 0x410000UL;
/*
* Invalidate TLB Entries.
*/
fire_write(iommu->iommu_flushinv, ~(u64)0);
pci_iommu_table_init(iommu, tsbsize * 8 * 1024, vdma[0], dma_mask);
fire_write(iommu->iommu_tsbbase, __pa(iommu->page_table) | 0x7UL);
control = fire_read(iommu->iommu_control);
control |= (0x00000400 /* TSB cache snoop enable */ |
0x00000300 /* Cache mode */ |
0x00000002 /* Bypass enable */ |
0x00000001 /* Translation enable */);
fire_write(iommu->iommu_control, control);
}
/* Based at pbm->controller_regs */
#define FIRE_PARITY_CONTROL 0x470010UL
#define FIRE_PARITY_ENAB 0x8000000000000000UL
#define FIRE_FATAL_RESET_CTL 0x471028UL
#define FIRE_FATAL_RESET_SPARE 0x0000000004000000UL
#define FIRE_FATAL_RESET_MB 0x0000000002000000UL
#define FIRE_FATAL_RESET_CPE 0x0000000000008000UL
#define FIRE_FATAL_RESET_APE 0x0000000000004000UL
#define FIRE_FATAL_RESET_PIO 0x0000000000000040UL
#define FIRE_FATAL_RESET_JW 0x0000000000000004UL
#define FIRE_FATAL_RESET_JI 0x0000000000000002UL
#define FIRE_FATAL_RESET_JR 0x0000000000000001UL
#define FIRE_CORE_INTR_ENABLE 0x471800UL
/* Based at pbm->pbm_regs */
#define FIRE_TLU_CTRL 0x80000UL
#define FIRE_TLU_CTRL_TIM 0x00000000da000000UL
#define FIRE_TLU_CTRL_QDET 0x0000000000000100UL
#define FIRE_TLU_CTRL_CFG 0x0000000000000001UL
#define FIRE_TLU_DEV_CTRL 0x90008UL
#define FIRE_TLU_LINK_CTRL 0x90020UL
#define FIRE_TLU_LINK_CTRL_CLK 0x0000000000000040UL
#define FIRE_LPU_RESET 0xe2008UL
#define FIRE_LPU_LLCFG 0xe2200UL
#define FIRE_LPU_LLCFG_VC0 0x0000000000000100UL
#define FIRE_LPU_FCTRL_UCTRL 0xe2240UL
#define FIRE_LPU_FCTRL_UCTRL_N 0x0000000000000002UL
#define FIRE_LPU_FCTRL_UCTRL_P 0x0000000000000001UL
#define FIRE_LPU_TXL_FIFOP 0xe2430UL
#define FIRE_LPU_LTSSM_CFG2 0xe2788UL
#define FIRE_LPU_LTSSM_CFG3 0xe2790UL
#define FIRE_LPU_LTSSM_CFG4 0xe2798UL
#define FIRE_LPU_LTSSM_CFG5 0xe27a0UL
#define FIRE_DMC_IENAB 0x31800UL
#define FIRE_DMC_DBG_SEL_A 0x53000UL
#define FIRE_DMC_DBG_SEL_B 0x53008UL
#define FIRE_PEC_IENAB 0x51800UL
static void pci_fire_hw_init(struct pci_pbm_info *pbm)
{
u64 val;
fire_write(pbm->controller_regs + FIRE_PARITY_CONTROL,
FIRE_PARITY_ENAB);
fire_write(pbm->controller_regs + FIRE_FATAL_RESET_CTL,
(FIRE_FATAL_RESET_SPARE |
FIRE_FATAL_RESET_MB |
FIRE_FATAL_RESET_CPE |
FIRE_FATAL_RESET_APE |
FIRE_FATAL_RESET_PIO |
FIRE_FATAL_RESET_JW |
FIRE_FATAL_RESET_JI |
FIRE_FATAL_RESET_JR));
fire_write(pbm->controller_regs + FIRE_CORE_INTR_ENABLE, ~(u64)0);
val = fire_read(pbm->pbm_regs + FIRE_TLU_CTRL);
val |= (FIRE_TLU_CTRL_TIM |
FIRE_TLU_CTRL_QDET |
FIRE_TLU_CTRL_CFG);
fire_write(pbm->pbm_regs + FIRE_TLU_CTRL, val);
fire_write(pbm->pbm_regs + FIRE_TLU_DEV_CTRL, 0);
fire_write(pbm->pbm_regs + FIRE_TLU_LINK_CTRL,
FIRE_TLU_LINK_CTRL_CLK);
fire_write(pbm->pbm_regs + FIRE_LPU_RESET, 0);
fire_write(pbm->pbm_regs + FIRE_LPU_LLCFG,
FIRE_LPU_LLCFG_VC0);
fire_write(pbm->pbm_regs + FIRE_LPU_FCTRL_UCTRL,
(FIRE_LPU_FCTRL_UCTRL_N |
FIRE_LPU_FCTRL_UCTRL_P));
fire_write(pbm->pbm_regs + FIRE_LPU_TXL_FIFOP,
((0xffff << 16) | (0x0000 << 0)));
fire_write(pbm->pbm_regs + FIRE_LPU_LTSSM_CFG2, 3000000);
fire_write(pbm->pbm_regs + FIRE_LPU_LTSSM_CFG3, 500000);
fire_write(pbm->pbm_regs + FIRE_LPU_LTSSM_CFG4,
(2 << 16) | (140 << 8));
fire_write(pbm->pbm_regs + FIRE_LPU_LTSSM_CFG5, 0);
fire_write(pbm->pbm_regs + FIRE_DMC_IENAB, ~(u64)0);
fire_write(pbm->pbm_regs + FIRE_DMC_DBG_SEL_A, 0);
fire_write(pbm->pbm_regs + FIRE_DMC_DBG_SEL_B, 0);
fire_write(pbm->pbm_regs + FIRE_PEC_IENAB, ~(u64)0);
}
static void pci_fire_pbm_init(struct pci_controller_info *p,
struct device_node *dp, u32 portid)
{
const struct linux_prom64_registers *regs;
struct pci_pbm_info *pbm;
if ((portid & 1) == 0)
pbm = &p->pbm_A;
else
pbm = &p->pbm_B;
pbm->next = pci_pbm_root;
pci_pbm_root = pbm;
pbm->scan_bus = pci_fire_scan_bus;
pbm->portid = portid;
pbm->parent = p;
pbm->prom_node = dp;
pbm->name = dp->full_name;
regs = of_get_property(dp, "reg", NULL);
pbm->pbm_regs = regs[0].phys_addr;
pbm->controller_regs = regs[1].phys_addr - 0x410000UL;
printk("%s: SUN4U PCIE Bus Module\n", pbm->name);
pci_determine_mem_io_space(pbm);
pci_get_pbm_props(pbm);
pci_fire_hw_init(pbm);
pci_fire_pbm_iommu_init(pbm);
}
static inline int portid_compare(u32 x, u32 y)
{
if (x == (y ^ 1))
return 1;
return 0;
}
void fire_pci_init(struct device_node *dp, const char *model_name)
{
struct pci_controller_info *p;
u32 portid = of_getintprop_default(dp, "portid", 0xff);
struct iommu *iommu;
struct pci_pbm_info *pbm;
for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
if (portid_compare(pbm->portid, portid)) {
pci_fire_pbm_init(pbm->parent, dp, portid);
return;
}
}
p = kzalloc(sizeof(struct pci_controller_info), GFP_ATOMIC);
if (!p)
goto fatal_memory_error;
iommu = kzalloc(sizeof(struct iommu), GFP_ATOMIC);
if (!iommu)
goto fatal_memory_error;
p->pbm_A.iommu = iommu;
iommu = kzalloc(sizeof(struct iommu), GFP_ATOMIC);
if (!iommu)
goto fatal_memory_error;
p->pbm_B.iommu = iommu;
p->index = pci_num_controllers++;
/* XXX MSI support XXX */
p->pci_ops = &pci_fire_ops;
/* Like PSYCHO and SCHIZO we have a 2GB aligned area
* for memory space.
*/
pci_memspace_mask = 0x7fffffffUL;
pci_fire_pbm_init(p, dp, portid);
return;
fatal_memory_error:
prom_printf("PCI_FIRE: Fatal memory allocation error.\n");
prom_halt();
}
