// SPDX-License-Identifier: GPL-2.0-only
/*
* Old U - boot compatibility for PowerQUICC II
* ( a . k . a . 82 xx with CPM , not the 8240 family of chips )
*
* Author : Scott Wood < scottwood @ freescale . com >
*
* Copyright ( c ) 2007 Freescale Semiconductor , Inc .
*/
#include "ops.h"
#include "stdio.h"
#include "cuboot.h"
#include "io.h"
#include "fsl-soc.h"
#define TARGET_CPM2
#define TARGET_HAS_ETH1
#include "ppcboot.h"
static bd_t bd;
struct cs_range {
u32 csnum;
u32 base; /* must be zero */
u32 addr;
u32 size;
};
struct pci_range {
u32 flags;
u32 pci_addr[2 ];
u32 phys_addr;
u32 size[2 ];
};
struct cs_range cs_ranges_buf[MAX_PROP_LEN / sizeof (struct cs_range)];
struct pci_range pci_ranges_buf[MAX_PROP_LEN / sizeof (struct pci_range)];
/* Different versions of u-boot put the BCSR in different places, and
* some don ' t set up the PCI PIC at all , so we assume the device tree is
* sane and update the BRx registers appropriately .
*
* For any node defined as compatible with fsl , pq2 - localbus ,
* # address / # size must be 2 / 1 for the localbus , and 1 / 1 for the parent bus .
* Ranges must be for whole chip selects .
*/
static void update_cs_ranges(void )
{
void *bus_node, *parent_node;
u32 *ctrl_addr;
unsigned long ctrl_size;
u32 naddr, nsize;
int len;
int i;
bus_node = finddevice("/localbus" );
if (!bus_node || !dt_is_compatible(bus_node, "fsl,pq2-localbus" ))
return ;
dt_get_reg_format(bus_node, &naddr, &nsize);
if (naddr != 2 || nsize != 1 )
goto err;
parent_node = get_parent(bus_node);
if (!parent_node)
goto err;
dt_get_reg_format(parent_node, &naddr, &nsize);
if (naddr != 1 || nsize != 1 )
goto err;
if (!dt_xlate_reg(bus_node, 0 , (unsigned long *)&ctrl_addr,
&ctrl_size))
goto err;
len = getprop(bus_node, "ranges" , cs_ranges_buf, sizeof (cs_ranges_buf));
for (i = 0 ; i < len / sizeof (struct cs_range); i++) {
u32 base, option;
int cs = cs_ranges_buf[i].csnum;
if (cs >= ctrl_size / 8 )
goto err;
if (cs_ranges_buf[i].base != 0 )
goto err;
base = in_be32(&ctrl_addr[cs * 2 ]);
/* If CS is already valid, use the existing flags.
* Otherwise , guess a sane default .
*/
if (base & 1 ) {
base &= 0 x7fff;
option = in_be32(&ctrl_addr[cs * 2 + 1 ]) & 0 x7fff;
} else {
base = 0 x1801;
option = 0 x10;
}
out_be32(&ctrl_addr[cs * 2 ], 0 );
out_be32(&ctrl_addr[cs * 2 + 1 ],
option | ~(cs_ranges_buf[i].size - 1 ));
out_be32(&ctrl_addr[cs * 2 ], base | cs_ranges_buf[i].addr);
}
return ;
err:
printf("Bad /localbus node\r\n" );
}
/* Older u-boots don't set PCI up properly. Update the hardware to match
* the device tree . The prefetch mem region and non - prefetch mem region
* must be contiguous in the host bus . As required by the PCI binding ,
* PCI # addr / # size must be 3 / 2 . The parent bus must be 1 / 1 . Only
* 32 - bit PCI is supported . All three region types ( prefetchable mem ,
* non - prefetchable mem , and I / O ) must be present .
*/
static void fixup_pci(void )
{
struct pci_range *mem = NULL, *mmio = NULL,
*io = NULL, *mem_base = NULL;
u32 *pci_regs[3 ];
u8 *soc_regs;
int i, len;
void *node, *parent_node;
u32 naddr, nsize, mem_pow2, mem_mask;
node = finddevice("/pci" );
if (!node || !dt_is_compatible(node, "fsl,pq2-pci" ))
return ;
for (i = 0 ; i < 3 ; i++)
if (!dt_xlate_reg(node, i,
(unsigned long *)&pci_regs[i], NULL))
goto err;
soc_regs = (u8 *)fsl_get_immr();
if (!soc_regs)
goto unhandled;
dt_get_reg_format(node, &naddr, &nsize);
if (naddr != 3 || nsize != 2 )
goto err;
parent_node = get_parent(node);
if (!parent_node)
goto err;
dt_get_reg_format(parent_node, &naddr, &nsize);
if (naddr != 1 || nsize != 1 )
goto unhandled;
len = getprop(node, "ranges" , pci_ranges_buf,
sizeof (pci_ranges_buf));
for (i = 0 ; i < len / sizeof (struct pci_range); i++) {
u32 flags = pci_ranges_buf[i].flags & 0 x43000000;
if (flags == 0 x42000000)
mem = &pci_ranges_buf[i];
else if (flags == 0 x02000000)
mmio = &pci_ranges_buf[i];
else if (flags == 0 x01000000)
io = &pci_ranges_buf[i];
}
if (!mem || !mmio || !io)
goto unhandled;
if (mem->size[1 ] != mmio->size[1 ])
goto unhandled;
if (mem->size[1 ] & (mem->size[1 ] - 1 ))
goto unhandled;
if (io->size[1 ] & (io->size[1 ] - 1 ))
goto unhandled;
if (mem->phys_addr + mem->size[1 ] == mmio->phys_addr)
mem_base = mem;
else if (mmio->phys_addr + mmio->size[1 ] == mem->phys_addr)
mem_base = mmio;
else
goto unhandled;
out_be32(&pci_regs[1 ][0 ], mem_base->phys_addr | 1 );
out_be32(&pci_regs[2 ][0 ], ~(mem->size[1 ] + mmio->size[1 ] - 1 ));
out_be32(&pci_regs[1 ][1 ], io->phys_addr | 1 );
out_be32(&pci_regs[2 ][1 ], ~(io->size[1 ] - 1 ));
out_le32(&pci_regs[0 ][0 ], mem->pci_addr[1 ] >> 12 );
out_le32(&pci_regs[0 ][2 ], mem->phys_addr >> 12 );
out_le32(&pci_regs[0 ][4 ], (~(mem->size[1 ] - 1 ) >> 12 ) | 0 xa0000000);
out_le32(&pci_regs[0 ][6 ], mmio->pci_addr[1 ] >> 12 );
out_le32(&pci_regs[0 ][8 ], mmio->phys_addr >> 12 );
out_le32(&pci_regs[0 ][10 ], (~(mmio->size[1 ] - 1 ) >> 12 ) | 0 x80000000);
out_le32(&pci_regs[0 ][12 ], io->pci_addr[1 ] >> 12 );
out_le32(&pci_regs[0 ][14 ], io->phys_addr >> 12 );
out_le32(&pci_regs[0 ][16 ], (~(io->size[1 ] - 1 ) >> 12 ) | 0 xc0000000);
/* Inbound translation */
out_le32(&pci_regs[0 ][58 ], 0 );
out_le32(&pci_regs[0 ][60 ], 0 );
mem_pow2 = 1 << (__ilog2_u32(bd.bi_memsize - 1 ) + 1 );
mem_mask = ~(mem_pow2 - 1 ) >> 12 ;
out_le32(&pci_regs[0 ][62 ], 0 xa0000000 | mem_mask);
/* If PCI is disabled, drive RST high to enable. */
if (!(in_le32(&pci_regs[0 ][32 ]) & 1 )) {
/* Tpvrh (Power valid to RST# high) 100 ms */
udelay(100000 );
out_le32(&pci_regs[0 ][32 ], 1 );
/* Trhfa (RST# high to first cfg access) 2^25 clocks */
udelay(1020000 );
}
/* Enable bus master and memory access */
out_le32(&pci_regs[0 ][64 ], 0 x80000004);
out_le32(&pci_regs[0 ][65 ], in_le32(&pci_regs[0 ][65 ]) | 6 );
/* Park the bus on PCI, and elevate PCI's arbitration priority,
* as required by section 9 . 6 of the user ' s manual .
*/
out_8(&soc_regs[0 x10028], 3 );
out_be32((u32 *)&soc_regs[0 x1002c], 0 x01236745);
return ;
err:
printf("Bad PCI node -- using existing firmware setup.\r\n" );
return ;
unhandled:
printf("Unsupported PCI node -- using existing firmware setup.\r\n" );
}
static void pq2_platform_fixups(void )
{
void *node;
dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
dt_fixup_mac_addresses(bd.bi_enetaddr, bd.bi_enet1addr);
dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4 , bd.bi_busfreq);
node = finddevice("/soc/cpm" );
if (node)
setprop(node, "clock-frequency" , &bd.bi_cpmfreq, 4 );
node = finddevice("/soc/cpm/brg" );
if (node)
setprop(node, "clock-frequency" , &bd.bi_brgfreq, 4 );
update_cs_ranges();
fixup_pci();
}
void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
CUBOOT_INIT();
fdt_init(_dtb_start);
serial_console_init();
platform_ops.fixups = pq2_platform_fixups;
}
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(vorverarbeitet am 2026-09-27)
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