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linux-stable-rt/arch/ppc/platforms/4xx/taishan.c

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/*
* arch/ppc/platforms/4xx/taishan.c
*
* AMCC Taishan board specific routines
*
* Copyright 2007 DENX Software Engineering, Stefan Roese <sr@denx.de>
*
* 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.
*/
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/types.h>
#include <linux/major.h>
#include <linux/blkdev.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <linux/initrd.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/platform_device.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/ndfc.h>
#include <linux/mtd/physmap.h>
#include <asm/machdep.h>
#include <asm/ocp.h>
#include <asm/bootinfo.h>
#include <asm/ppcboot.h>
#include <syslib/gen550.h>
#include <syslib/ibm440gx_common.h>
extern bd_t __res;
static struct ibm44x_clocks clocks __initdata;
/*
* NOR FLASH configuration (using mtd physmap driver)
*/
/* start will be added dynamically, end is always fixed */
static struct resource taishan_nor_resource = {
.start = TAISHAN_FLASH_ADDR,
.end = 0x1ffffffffULL,
.flags = IORESOURCE_MEM,
};
#define RW_PART0_OF 0
#define RW_PART0_SZ 0x180000
#define RW_PART1_SZ 0x200000
/* Partition 2 will be autosized dynamically... */
#define RW_PART3_SZ 0x80000
#define RW_PART4_SZ 0x40000
static struct mtd_partition taishan_nor_parts[] = {
{
.name = "kernel",
.offset = 0,
.size = RW_PART0_SZ
},
{
.name = "root",
.offset = MTDPART_OFS_APPEND,
.size = RW_PART1_SZ,
},
{
.name = "user",
.offset = MTDPART_OFS_APPEND,
/* .size = RW_PART2_SZ */ /* will be adjusted dynamically */
},
{
.name = "env",
.offset = MTDPART_OFS_APPEND,
.size = RW_PART3_SZ,
},
{
.name = "u-boot",
.offset = MTDPART_OFS_APPEND,
.size = RW_PART4_SZ,
}
};
static struct physmap_flash_data taishan_nor_data = {
.width = 4,
.parts = taishan_nor_parts,
.nr_parts = ARRAY_SIZE(taishan_nor_parts),
};
static struct platform_device taishan_nor_device = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &taishan_nor_data,
},
.num_resources = 1,
.resource = &taishan_nor_resource,
};
static int taishan_setup_flash(void)
{
/*
* Adjust partition 2 to flash size
*/
taishan_nor_parts[2].size = __res.bi_flashsize -
RW_PART0_SZ - RW_PART1_SZ - RW_PART3_SZ - RW_PART4_SZ;
platform_device_register(&taishan_nor_device);
return 0;
}
arch_initcall(taishan_setup_flash);
static void __init
taishan_calibrate_decr(void)
{
unsigned int freq;
if (mfspr(SPRN_CCR1) & CCR1_TCS)
freq = TAISHAN_TMR_CLK;
else
freq = clocks.cpu;
ibm44x_calibrate_decr(freq);
}
static int
taishan_show_cpuinfo(struct seq_file *m)
{
seq_printf(m, "vendor\t\t: AMCC\n");
seq_printf(m, "machine\t\t: PPC440GX EVB (Taishan)\n");
ibm440gx_show_cpuinfo(m);
return 0;
}
static inline int
taishan_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
static char pci_irq_table[][4] =
/*
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{
{ 23, 24, 25, 26 }, /* IDSEL 1 - PCI Slot 0 */
{ 24, 25, 26, 23 }, /* IDSEL 2 - PCI Slot 1 */
};
const long min_idsel = 1, max_idsel = 2, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
static void __init taishan_set_emacdata(void)
{
struct ocp_def *def;
struct ocp_func_emac_data *emacdata;
int i;
/* Set phy_map, phy_mode, and mac_addr for each EMAC */
for (i=2; i<4; i++) {
def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, i);
emacdata = def->additions;
if (i < 2) {
emacdata->phy_map = 0x00000001; /* Skip 0x00 */
emacdata->phy_mode = PHY_MODE_SMII;
} else {
emacdata->phy_map = 0x00000001; /* Skip 0x00 */
emacdata->phy_mode = PHY_MODE_RGMII;
}
if (i == 0)
memcpy(emacdata->mac_addr, "\0\0\0\0\0\0", 6);
else if (i == 1)
memcpy(emacdata->mac_addr, "\0\0\0\0\0\0", 6);
else if (i == 2)
memcpy(emacdata->mac_addr, __res.bi_enetaddr, 6);
else if (i == 3)
memcpy(emacdata->mac_addr, __res.bi_enet1addr, 6);
}
}
#define PCIX_READW(offset) \
(readw(pcix_reg_base+offset))
#define PCIX_WRITEW(value, offset) \
(writew(value, pcix_reg_base+offset))
#define PCIX_WRITEL(value, offset) \
(writel(value, pcix_reg_base+offset))
/*
* FIXME: This is only here to "make it work". This will move
* to a ibm_pcix.c which will contain a generic IBM PCIX bridge
* configuration library. -Matt
*/
static void __init
taishan_setup_pcix(void)
{
void *pcix_reg_base;
pcix_reg_base = ioremap64(PCIX0_REG_BASE, PCIX_REG_SIZE);
/* Enable PCIX0 I/O, Mem, and Busmaster cycles */
PCIX_WRITEW(PCIX_READW(PCIX0_COMMAND) | PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER, PCIX0_COMMAND);
/* Disable all windows */
PCIX_WRITEL(0, PCIX0_POM0SA);
PCIX_WRITEL(0, PCIX0_POM1SA);
PCIX_WRITEL(0, PCIX0_POM2SA);
PCIX_WRITEL(0, PCIX0_PIM0SA);
PCIX_WRITEL(0, PCIX0_PIM0SAH);
PCIX_WRITEL(0, PCIX0_PIM1SA);
PCIX_WRITEL(0, PCIX0_PIM2SA);
PCIX_WRITEL(0, PCIX0_PIM2SAH);
/* Setup 2GB PLB->PCI outbound mem window (3_8000_0000->0_8000_0000) */
PCIX_WRITEL(0x00000003, PCIX0_POM0LAH);
PCIX_WRITEL(0x80000000, PCIX0_POM0LAL);
PCIX_WRITEL(0x00000000, PCIX0_POM0PCIAH);
PCIX_WRITEL(0x80000000, PCIX0_POM0PCIAL);
PCIX_WRITEL(0x80000001, PCIX0_POM0SA);
/* Setup 2GB PCI->PLB inbound memory window at 0, enable MSIs */
PCIX_WRITEL(0x00000000, PCIX0_PIM0LAH);
PCIX_WRITEL(0x00000000, PCIX0_PIM0LAL);
PCIX_WRITEL(0x80000007, PCIX0_PIM0SA);
PCIX_WRITEL(0xffffffff, PCIX0_PIM0SAH);
iounmap(pcix_reg_base);
eieio();
}
static void __init
taishan_setup_hose(void)
{
struct pci_controller *hose;
/* Configure windows on the PCI-X host bridge */
taishan_setup_pcix();
hose = pcibios_alloc_controller();
if (!hose)
return;
hose->first_busno = 0;
hose->last_busno = 0xff;
hose->pci_mem_offset = TAISHAN_PCI_MEM_OFFSET;
pci_init_resource(&hose->io_resource,
TAISHAN_PCI_LOWER_IO,
TAISHAN_PCI_UPPER_IO,
IORESOURCE_IO,
"PCI host bridge");
pci_init_resource(&hose->mem_resources[0],
TAISHAN_PCI_LOWER_MEM,
TAISHAN_PCI_UPPER_MEM,
IORESOURCE_MEM,
"PCI host bridge");
hose->io_space.start = TAISHAN_PCI_LOWER_IO;
hose->io_space.end = TAISHAN_PCI_UPPER_IO;
hose->mem_space.start = TAISHAN_PCI_LOWER_MEM;
hose->mem_space.end = TAISHAN_PCI_UPPER_MEM;
hose->io_base_virt = ioremap64(TAISHAN_PCI_IO_BASE, TAISHAN_PCI_IO_SIZE);
isa_io_base = (unsigned long) hose->io_base_virt;
setup_indirect_pci(hose,
TAISHAN_PCI_CFGA_PLB32,
TAISHAN_PCI_CFGD_PLB32);
hose->set_cfg_type = 1;
hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
ppc_md.pci_swizzle = common_swizzle;
ppc_md.pci_map_irq = taishan_map_irq;
}
static void __init
taishan_early_serial_map(void)
{
struct uart_port port;
/* Setup ioremapped serial port access */
memset(&port, 0, sizeof(port));
port.membase = ioremap64(PPC440GX_UART0_ADDR, 8);
port.irq = UART0_INT;
port.uartclk = clocks.uart0;
port.regshift = 0;
port.iotype = UPIO_MEM;
port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
port.line = 0;
if (early_serial_setup(&port) != 0)
printk("Early serial init of port 0 failed\n");
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
/* Configure debug serial access */
gen550_init(0, &port);
/* Purge TLB entry added in head_44x.S for early serial access */
_tlbie(UART0_IO_BASE);
#endif
port.membase = ioremap64(PPC440GX_UART1_ADDR, 8);
port.irq = UART1_INT;
port.uartclk = clocks.uart1;
port.line = 1;
if (early_serial_setup(&port) != 0)
printk("Early serial init of port 1 failed\n");
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
/* Configure debug serial access */
gen550_init(1, &port);
#endif
}
static void __init
taishan_setup_arch(void)
{
taishan_set_emacdata();
ibm440gx_tah_enable();
/*
* Determine various clocks.
* To be completely correct we should get SysClk
* from FPGA, because it can be changed by on-board switches
* --ebs
*/
ibm440gx_get_clocks(&clocks, 33333333, 6 * 1843200);
ocp_sys_info.opb_bus_freq = clocks.opb;
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000/HZ;
/* Setup PCI host bridge */
taishan_setup_hose();
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
ROOT_DEV = Root_RAM0;
else
#endif
#ifdef CONFIG_ROOT_NFS
ROOT_DEV = Root_NFS;
#else
ROOT_DEV = Root_HDA1;
#endif
taishan_early_serial_map();
/* Identify the system */
printk("AMCC PowerPC 440GX Taishan Platform\n");
}
static void __init taishan_init(void)
{
ibm440gx_l2c_setup(&clocks);
}
void __init platform_init(unsigned long r3, unsigned long r4,
unsigned long r5, unsigned long r6, unsigned long r7)
{
ibm44x_platform_init(r3, r4, r5, r6, r7);
ppc_md.setup_arch = taishan_setup_arch;
ppc_md.show_cpuinfo = taishan_show_cpuinfo;
ppc_md.get_irq = NULL; /* Set in ppc4xx_pic_init() */
ppc_md.calibrate_decr = taishan_calibrate_decr;
#ifdef CONFIG_KGDB
ppc_md.early_serial_map = taishan_early_serial_map;
#endif
ppc_md.init = taishan_init;
}
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