// SPDX-License-Identifier: GPL-2.0-only
/*
* arch / arm / mach - orion5x / ts78xx - setup . c
*
* Maintainer : Alexander Clouter < alex @ digriz . org . uk >
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sysfs.h>
#include <linux/platform_device.h>
#include <linux/mv643xx_eth.h>
#include <linux/ata_platform.h>
#include <linux/mtd/platnand.h>
#include <linux/timeriomem-rng.h>
#include <asm /mach-types.h>
#include <asm /mach/arch.h>
#include <asm /mach/map.h>
#include "common.h"
#include "mpp.h"
#include "orion5x.h"
#include "ts78xx-fpga.h"
/*****************************************************************************
* TS - 78 xx Info
****************************************************************************/
/*
* FPGA - lives where the PCI bus would be at ORION5X_PCI_MEM_PHYS_BASE
*/
#define TS78XX_FPGA_REGS_PHYS_BASE 0 xe8000000
#define TS78XX_FPGA_REGS_VIRT_BASE IOMEM(0 xff900000)
#define TS78XX_FPGA_REGS_SIZE SZ_1M
static struct ts78xx_fpga_data ts78xx_fpga = {
.id = 0 ,
.state = 1 ,
/* .supports = ... - populated by ts78xx_fpga_supports() */
};
/*****************************************************************************
* I / O Address Mapping
****************************************************************************/
static struct map_desc ts78xx_io_desc[] __initdata = {
{
.virtual = (unsigned long )TS78XX_FPGA_REGS_VIRT_BASE,
.pfn = __phys_to_pfn(TS78XX_FPGA_REGS_PHYS_BASE),
.length = TS78XX_FPGA_REGS_SIZE,
.type = MT_DEVICE,
},
};
static void __init ts78xx_map_io(void )
{
orion5x_map_io();
iotable_init(ts78xx_io_desc, ARRAY_SIZE(ts78xx_io_desc));
}
/*****************************************************************************
* Ethernet
****************************************************************************/
static struct mv643xx_eth_platform_data ts78xx_eth_data = {
.phy_addr = MV643XX_ETH_PHY_ADDR(0 ),
};
/*****************************************************************************
* SATA
****************************************************************************/
static struct mv_sata_platform_data ts78xx_sata_data = {
.n_ports = 2 ,
};
/*****************************************************************************
* RTC M48T86 - nicked ^ Wborrowed from arch / arm / mach - ep93xx / ts72xx . c
****************************************************************************/
#define TS_RTC_CTRL (TS78XX_FPGA_REGS_PHYS_BASE + 0 x808)
#define TS_RTC_DATA (TS78XX_FPGA_REGS_PHYS_BASE + 0 x80c)
static struct resource ts78xx_ts_rtc_resources[] = {
DEFINE_RES_MEM(TS_RTC_CTRL, 0 x01),
DEFINE_RES_MEM(TS_RTC_DATA, 0 x01),
};
static struct platform_device ts78xx_ts_rtc_device = {
.name = "rtc-m48t86" ,
.id = -1 ,
.resource = ts78xx_ts_rtc_resources,
.num_resources = ARRAY_SIZE(ts78xx_ts_rtc_resources),
};
static int ts78xx_ts_rtc_load(void )
{
int rc;
if (ts78xx_fpga.supports.ts_rtc.init == 0 ) {
rc = platform_device_register(&ts78xx_ts_rtc_device);
if (!rc)
ts78xx_fpga.supports.ts_rtc.init = 1 ;
} else {
rc = platform_device_add(&ts78xx_ts_rtc_device);
}
if (rc)
pr_info("RTC could not be registered: %d\n" , rc);
return rc;
}
static void ts78xx_ts_rtc_unload(void )
{
platform_device_del(&ts78xx_ts_rtc_device);
}
/*****************************************************************************
* NAND Flash
****************************************************************************/
#define TS_NAND_CTRL (TS78XX_FPGA_REGS_VIRT_BASE + 0 x800) /* VIRT */
#define TS_NAND_DATA (TS78XX_FPGA_REGS_PHYS_BASE + 0 x804) /* PHYS */
/*
* hardware specific access to control - lines
*
* ctrl :
* NAND_NCE : bit 0 - > bit 2
* NAND_CLE : bit 1 - > bit 1
* NAND_ALE : bit 2 - > bit 0
*/
static void ts78xx_ts_nand_cmd_ctrl(struct nand_chip *this , int cmd,
unsigned int ctrl)
{
if (ctrl & NAND_CTRL_CHANGE) {
unsigned char bits;
bits = (ctrl & NAND_NCE) << 2 ;
bits |= ctrl & NAND_CLE;
bits |= (ctrl & NAND_ALE) >> 2 ;
writeb((readb(TS_NAND_CTRL) & ~0 x7) | bits, TS_NAND_CTRL);
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, this ->legacy.IO_ADDR_W);
}
static int ts78xx_ts_nand_dev_ready(struct nand_chip *chip)
{
return readb(TS_NAND_CTRL) & 0 x20;
}
static void ts78xx_ts_nand_write_buf(struct nand_chip *chip,
const uint8_t *buf, int len)
{
void __iomem *io_base = chip->legacy.IO_ADDR_W;
unsigned long off = ((unsigned long )buf & 3 );
int sz;
if (off) {
sz = min_t(int , 4 - off, len);
writesb(io_base, buf, sz);
buf += sz;
len -= sz;
}
sz = len >> 2 ;
if (sz) {
u32 *buf32 = (u32 *)buf;
writesl(io_base, buf32, sz);
buf += sz << 2 ;
len -= sz << 2 ;
}
if (len)
writesb(io_base, buf, len);
}
static void ts78xx_ts_nand_read_buf(struct nand_chip *chip,
uint8_t *buf, int len)
{
void __iomem *io_base = chip->legacy.IO_ADDR_R;
unsigned long off = ((unsigned long )buf & 3 );
int sz;
if (off) {
sz = min_t(int , 4 - off, len);
readsb(io_base, buf, sz);
buf += sz;
len -= sz;
}
sz = len >> 2 ;
if (sz) {
u32 *buf32 = (u32 *)buf;
readsl(io_base, buf32, sz);
buf += sz << 2 ;
len -= sz << 2 ;
}
if (len)
readsb(io_base, buf, len);
}
static struct mtd_partition ts78xx_ts_nand_parts[] = {
{
.name = "mbr" ,
.offset = 0 ,
.size = SZ_128K,
.mask_flags = MTD_WRITEABLE,
}, {
.name = "kernel" ,
.offset = MTDPART_OFS_APPEND,
.size = SZ_4M,
}, {
.name = "initrd" ,
.offset = MTDPART_OFS_APPEND,
.size = SZ_4M,
}, {
.name = "rootfs" ,
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
}
};
static struct platform_nand_data ts78xx_ts_nand_data = {
.chip = {
.nr_chips = 1 ,
.partitions = ts78xx_ts_nand_parts,
.nr_partitions = ARRAY_SIZE(ts78xx_ts_nand_parts),
.chip_delay = 15 ,
.bbt_options = NAND_BBT_USE_FLASH,
},
.ctrl = {
/*
* The HW ECC offloading functions , used to give about a 9 %
* performance increase for ' dd if = / dev / mtdblockX ' and 5 % for
* nanddump . This all however was changed by git commit
* e6cf5df1838c28bb060ac45b5585e48e71bbc740 so now there is
* no performance advantage to be had so we no longer bother
*/
.cmd_ctrl = ts78xx_ts_nand_cmd_ctrl,
.dev_ready = ts78xx_ts_nand_dev_ready,
.write_buf = ts78xx_ts_nand_write_buf,
.read_buf = ts78xx_ts_nand_read_buf,
},
};
static struct resource ts78xx_ts_nand_resources
= DEFINE_RES_MEM(TS_NAND_DATA, 4 );
static struct platform_device ts78xx_ts_nand_device = {
.name = "gen_nand" ,
.id = -1 ,
.dev = {
.platform_data = &ts78xx_ts_nand_data,
},
.resource = &ts78xx_ts_nand_resources,
.num_resources = 1 ,
};
static int ts78xx_ts_nand_load(void )
{
int rc;
if (ts78xx_fpga.supports.ts_nand.init == 0 ) {
rc = platform_device_register(&ts78xx_ts_nand_device);
if (!rc)
ts78xx_fpga.supports.ts_nand.init = 1 ;
} else
rc = platform_device_add(&ts78xx_ts_nand_device);
if (rc)
pr_info("NAND could not be registered: %d\n" , rc);
return rc;
};
static void ts78xx_ts_nand_unload(void )
{
platform_device_del(&ts78xx_ts_nand_device);
}
/*****************************************************************************
* HW RNG
****************************************************************************/
#define TS_RNG_DATA (TS78XX_FPGA_REGS_PHYS_BASE | 0 x044)
static struct resource ts78xx_ts_rng_resource
= DEFINE_RES_MEM(TS_RNG_DATA, 4 );
static struct timeriomem_rng_data ts78xx_ts_rng_data = {
.period = 1000000 , /* one second */
};
static struct platform_device ts78xx_ts_rng_device = {
.name = "timeriomem_rng" ,
.id = -1 ,
.dev = {
.platform_data = &ts78xx_ts_rng_data,
},
.resource = &ts78xx_ts_rng_resource,
.num_resources = 1 ,
};
static int ts78xx_ts_rng_load(void )
{
int rc;
if (ts78xx_fpga.supports.ts_rng.init == 0 ) {
rc = platform_device_register(&ts78xx_ts_rng_device);
if (!rc)
ts78xx_fpga.supports.ts_rng.init = 1 ;
} else
rc = platform_device_add(&ts78xx_ts_rng_device);
if (rc)
pr_info("RNG could not be registered: %d\n" , rc);
return rc;
};
static void ts78xx_ts_rng_unload(void )
{
platform_device_del(&ts78xx_ts_rng_device);
}
/*****************************************************************************
* FPGA ' hotplug ' support code
****************************************************************************/
static void ts78xx_fpga_devices_zero_init(void )
{
ts78xx_fpga.supports.ts_rtc.init = 0 ;
ts78xx_fpga.supports.ts_nand.init = 0 ;
ts78xx_fpga.supports.ts_rng.init = 0 ;
}
static void ts78xx_fpga_supports(void )
{
/* TODO: put this 'table' into ts78xx-fpga.h */
switch (ts78xx_fpga.id) {
case TS7800_REV_1:
case TS7800_REV_2:
case TS7800_REV_3:
case TS7800_REV_4:
case TS7800_REV_5:
case TS7800_REV_6:
case TS7800_REV_7:
case TS7800_REV_8:
case TS7800_REV_9:
ts78xx_fpga.supports.ts_rtc.present = 1 ;
ts78xx_fpga.supports.ts_nand.present = 1 ;
ts78xx_fpga.supports.ts_rng.present = 1 ;
break ;
default :
/* enable devices if magic matches */
switch ((ts78xx_fpga.id >> 8 ) & 0 xffffff) {
case TS7800_FPGA_MAGIC:
pr_warn("unrecognised FPGA revision 0x%.2x\n" ,
ts78xx_fpga.id & 0 xff);
ts78xx_fpga.supports.ts_rtc.present = 1 ;
ts78xx_fpga.supports.ts_nand.present = 1 ;
ts78xx_fpga.supports.ts_rng.present = 1 ;
break ;
default :
ts78xx_fpga.supports.ts_rtc.present = 0 ;
ts78xx_fpga.supports.ts_nand.present = 0 ;
ts78xx_fpga.supports.ts_rng.present = 0 ;
}
}
}
static int ts78xx_fpga_load_devices(void )
{
int tmp, ret = 0 ;
if (ts78xx_fpga.supports.ts_rtc.present == 1 ) {
tmp = ts78xx_ts_rtc_load();
if (tmp)
ts78xx_fpga.supports.ts_rtc.present = 0 ;
ret |= tmp;
}
if (ts78xx_fpga.supports.ts_nand.present == 1 ) {
tmp = ts78xx_ts_nand_load();
if (tmp)
ts78xx_fpga.supports.ts_nand.present = 0 ;
ret |= tmp;
}
if (ts78xx_fpga.supports.ts_rng.present == 1 ) {
tmp = ts78xx_ts_rng_load();
if (tmp)
ts78xx_fpga.supports.ts_rng.present = 0 ;
ret |= tmp;
}
return ret;
}
static int ts78xx_fpga_unload_devices(void )
{
if (ts78xx_fpga.supports.ts_rtc.present == 1 )
ts78xx_ts_rtc_unload();
if (ts78xx_fpga.supports.ts_nand.present == 1 )
ts78xx_ts_nand_unload();
if (ts78xx_fpga.supports.ts_rng.present == 1 )
ts78xx_ts_rng_unload();
return 0 ;
}
static int ts78xx_fpga_load(void )
{
ts78xx_fpga.id = readl(TS78XX_FPGA_REGS_VIRT_BASE);
pr_info("FPGA magic=0x%.6x, rev=0x%.2x\n" ,
(ts78xx_fpga.id >> 8 ) & 0 xffffff,
ts78xx_fpga.id & 0 xff);
ts78xx_fpga_supports();
if (ts78xx_fpga_load_devices()) {
ts78xx_fpga.state = -1 ;
return -EBUSY;
}
return 0 ;
};
static int ts78xx_fpga_unload(void )
{
unsigned int fpga_id;
fpga_id = readl(TS78XX_FPGA_REGS_VIRT_BASE);
/*
* There does not seem to be a feasible way to block access to the GPIO
* pins from userspace ( / dev / mem ) . This if clause should hopefully warn
* those foolish enough not to follow ' policy ' : )
*
* UrJTAG SVN since r1381 can be used to reprogram the FPGA
*/
if (ts78xx_fpga.id != fpga_id) {
pr_err("FPGA magic/rev mismatch\n"
"TS-78xx FPGA: was 0x%.6x/%.2x but now 0x%.6x/%.2x\n" ,
(ts78xx_fpga.id >> 8 ) & 0 xffffff, ts78xx_fpga.id & 0 xff,
(fpga_id >> 8 ) & 0 xffffff, fpga_id & 0 xff);
ts78xx_fpga.state = -1 ;
return -EBUSY;
}
if (ts78xx_fpga_unload_devices()) {
ts78xx_fpga.state = -1 ;
return -EBUSY;
}
return 0 ;
};
static ssize_t ts78xx_fpga_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
if (ts78xx_fpga.state < 0 )
return sprintf(buf, "borked\n" );
return sprintf(buf, "%s\n" , (ts78xx_fpga.state) ? "online" : "offline" );
}
static ssize_t ts78xx_fpga_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t n)
{
int value, ret;
if (ts78xx_fpga.state < 0 ) {
pr_err("FPGA borked, you must powercycle ASAP\n" );
return -EBUSY;
}
if (strncmp(buf, "online" , sizeof ("online" ) - 1 ) == 0 )
value = 1 ;
else if (strncmp(buf, "offline" , sizeof ("offline" ) - 1 ) == 0 )
value = 0 ;
else
return -EINVAL;
if (ts78xx_fpga.state == value)
return n;
ret = (ts78xx_fpga.state == 0 )
? ts78xx_fpga_load()
: ts78xx_fpga_unload();
if (!(ret < 0 ))
ts78xx_fpga.state = value;
return n;
}
static struct kobj_attribute ts78xx_fpga_attr =
__ATTR(ts78xx_fpga, 0644 , ts78xx_fpga_show, ts78xx_fpga_store);
/*****************************************************************************
* General Setup
****************************************************************************/
static unsigned int ts78xx_mpp_modes[] __initdata = {
MPP0_UNUSED,
MPP1_GPIO, /* JTAG Clock */
MPP2_GPIO, /* JTAG Data In */
MPP3_GPIO, /* Lat ECP2 256 FPGA - PB2B */
MPP4_GPIO, /* JTAG Data Out */
MPP5_GPIO, /* JTAG TMS */
MPP6_GPIO, /* Lat ECP2 256 FPGA - PB31A_CLK4+ */
MPP7_GPIO, /* Lat ECP2 256 FPGA - PB22B */
MPP8_UNUSED,
MPP9_UNUSED,
MPP10_UNUSED,
MPP11_UNUSED,
MPP12_UNUSED,
MPP13_UNUSED,
MPP14_UNUSED,
MPP15_UNUSED,
MPP16_UART,
MPP17_UART,
MPP18_UART,
MPP19_UART,
/*
* MPP [ 20 ] PCI Clock Out 1
* MPP [ 21 ] PCI Clock Out 0
* MPP [ 22 ] Unused
* MPP [ 23 ] Unused
* MPP [ 24 ] Unused
* MPP [ 25 ] Unused
*/
0 ,
};
static void __init ts78xx_init(void )
{
int ret;
/*
* Setup basic Orion functions . Need to be called early .
*/
orion5x_init();
orion5x_mpp_conf(ts78xx_mpp_modes);
/*
* Configure peripherals .
*/
orion5x_ehci0_init();
orion5x_ehci1_init();
orion5x_eth_init(&ts78xx_eth_data);
orion5x_sata_init(&ts78xx_sata_data);
orion5x_uart0_init();
orion5x_uart1_init();
orion5x_xor_init();
/* FPGA init */
ts78xx_fpga_devices_zero_init();
ret = ts78xx_fpga_load();
ret = sysfs_create_file(firmware_kobj, &ts78xx_fpga_attr.attr);
if (ret)
pr_err("sysfs_create_file failed: %d\n" , ret);
}
MACHINE_START(TS78XX, "Technologic Systems TS-78xx SBC" )
/* Maintainer: Alexander Clouter <alex@digriz.org.uk> */
.atag_offset = 0 x100,
.nr_irqs = ORION5X_NR_IRQS,
.init_machine = ts78xx_init,
.map_io = ts78xx_map_io,
.init_early = orion5x_init_early,
.init_irq = orion5x_init_irq,
.init_time = orion5x_timer_init,
.restart = orion5x_restart,
MACHINE_END
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