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linux/arch/ppc/platforms/4xx/bamboo.c
Matt Porter d5f7b06b03 [PATCH] ppc32: Cleanup AMCC PPC44x eval board U-Boot support 
Cleanup PPC440 eval boards (bamboo, ebony, luan and ocotea) to better
support U-Boot as bootloader.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-29 13:55:39 +10:00

446 lines
11 KiB
C
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/*
* arch/ppc/platforms/4xx/bamboo.c
*
* Bamboo board specific routines
*
* Wade Farnsworth <wfarnsworth@mvista.com>
* Copyright 2004 MontaVista Software Inc.
*
* 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/config.h>
#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/ethtool.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/dma.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/ocp.h>
#include <asm/pci-bridge.h>
#include <asm/time.h>
#include <asm/todc.h>
#include <asm/bootinfo.h>
#include <asm/ppc4xx_pic.h>
#include <asm/ppcboot.h>
#include <syslib/gen550.h>
#include <syslib/ibm440gx_common.h>
extern bd_t __res;
static struct ibm44x_clocks clocks __initdata;
/*
* Bamboo external IRQ triggering/polarity settings
*/
unsigned char ppc4xx_uic_ext_irq_cfg[] __initdata = {
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ0: Ethernet transceiver */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* IRQ1: Expansion connector */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ2: PCI slot 0 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ3: PCI slot 1 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ4: PCI slot 2 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ5: PCI slot 3 */
(IRQ_SENSE_EDGE | IRQ_POLARITY_NEGATIVE), /* IRQ6: SMI pushbutton */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ7: EXT */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ8: EXT */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ9: EXT */
};
static void __init
bamboo_calibrate_decr(void)
{
unsigned int freq;
if (mfspr(SPRN_CCR1) & CCR1_TCS)
freq = BAMBOO_TMRCLK;
else
freq = clocks.cpu;
ibm44x_calibrate_decr(freq);
}
static int
bamboo_show_cpuinfo(struct seq_file *m)
{
seq_printf(m, "vendor\t\t: IBM\n");
seq_printf(m, "machine\t\t: PPC440EP EVB (Bamboo)\n");
return 0;
}
static inline int
bamboo_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
*/
{
{ 28, 28, 28, 28 }, /* IDSEL 1 - PCI Slot 0 */
{ 27, 27, 27, 27 }, /* IDSEL 2 - PCI Slot 1 */
{ 26, 26, 26, 26 }, /* IDSEL 3 - PCI Slot 2 */
{ 25, 25, 25, 25 }, /* IDSEL 4 - PCI Slot 3 */
};
const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
static void __init bamboo_set_emacdata(void)
{
u8 * base_addr;
struct ocp_def *def;
struct ocp_func_emac_data *emacdata;
u8 val;
int mode;
u32 excluded = 0;
base_addr = ioremap64(BAMBOO_FPGA_SELECTION1_REG_ADDR, 16);
val = readb(base_addr);
iounmap((void *) base_addr);
if (BAMBOO_SEL_MII(val))
mode = PHY_MODE_MII;
else if (BAMBOO_SEL_RMII(val))
mode = PHY_MODE_RMII;
else
mode = PHY_MODE_SMII;
/*
* SW2 on the Bamboo is used for ethernet configuration and is accessed
* via the CONFIG2 register in the FPGA. If the ANEG pin is set,
* overwrite the supported features with the settings in SW2.
*
* This is used as a workaround for the improperly biased RJ-45 sockets
* on the Rev. 0 Bamboo. By default only 10baseT is functional.
* Removing inductors L17 and L18 from the board allows 100baseT, but
* disables 10baseT. The Rev. 1 has no such limitations.
*/
base_addr = ioremap64(BAMBOO_FPGA_CONFIG2_REG_ADDR, 8);
val = readb(base_addr);
iounmap((void *) base_addr);
if (!BAMBOO_AUTONEGOTIATE(val)) {
excluded |= SUPPORTED_Autoneg;
if (BAMBOO_FORCE_100Mbps(val)) {
excluded |= SUPPORTED_10baseT_Full;
excluded |= SUPPORTED_10baseT_Half;
if (BAMBOO_FULL_DUPLEX_EN(val))
excluded |= SUPPORTED_100baseT_Half;
else
excluded |= SUPPORTED_100baseT_Full;
} else {
excluded |= SUPPORTED_100baseT_Full;
excluded |= SUPPORTED_100baseT_Half;
if (BAMBOO_FULL_DUPLEX_EN(val))
excluded |= SUPPORTED_10baseT_Half;
else
excluded |= SUPPORTED_10baseT_Full;
}
}
/* Set mac_addr, phy mode and unsupported phy features for each EMAC */
def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 0);
emacdata = def->additions;
memcpy(emacdata->mac_addr, __res.bi_enetaddr, 6);
emacdata->phy_mode = mode;
emacdata->phy_feat_exc = excluded;
def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 1);
emacdata = def->additions;
memcpy(emacdata->mac_addr, __res.bi_enet1addr, 6);
emacdata->phy_mode = mode;
emacdata->phy_feat_exc = excluded;
}
static int
bamboo_exclude_device(unsigned char bus, unsigned char devfn)
{
return (bus == 0 && devfn == 0);
}
#define PCI_READW(offset) \
(readw((void *)((u32)pci_reg_base+offset)))
#define PCI_WRITEW(value, offset) \
(writew(value, (void *)((u32)pci_reg_base+offset)))
#define PCI_WRITEL(value, offset) \
(writel(value, (void *)((u32)pci_reg_base+offset)))
static void __init
bamboo_setup_pci(void)
{
void *pci_reg_base;
unsigned long memory_size;
memory_size = ppc_md.find_end_of_memory();
pci_reg_base = ioremap64(BAMBOO_PCIL0_BASE, BAMBOO_PCIL0_SIZE);
/* Enable PCI I/O, Mem, and Busmaster cycles */
PCI_WRITEW(PCI_READW(PCI_COMMAND) |
PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER, PCI_COMMAND);
/* Disable region first */
PCI_WRITEL(0, BAMBOO_PCIL0_PMM0MA);
/* PLB starting addr: 0x00000000A0000000 */
PCI_WRITEL(BAMBOO_PCI_PHY_MEM_BASE, BAMBOO_PCIL0_PMM0LA);
/* PCI start addr, 0xA0000000 (PCI Address) */
PCI_WRITEL(BAMBOO_PCI_MEM_BASE, BAMBOO_PCIL0_PMM0PCILA);
PCI_WRITEL(0, BAMBOO_PCIL0_PMM0PCIHA);
/* Enable no pre-fetch, enable region */
PCI_WRITEL(((0xffffffff -
(BAMBOO_PCI_UPPER_MEM - BAMBOO_PCI_MEM_BASE)) | 0x01),
BAMBOO_PCIL0_PMM0MA);
/* Disable region one */
PCI_WRITEL(0, BAMBOO_PCIL0_PMM1MA);
PCI_WRITEL(0, BAMBOO_PCIL0_PMM1LA);
PCI_WRITEL(0, BAMBOO_PCIL0_PMM1PCILA);
PCI_WRITEL(0, BAMBOO_PCIL0_PMM1PCIHA);
PCI_WRITEL(0, BAMBOO_PCIL0_PMM1MA);
/* Disable region two */
PCI_WRITEL(0, BAMBOO_PCIL0_PMM2MA);
PCI_WRITEL(0, BAMBOO_PCIL0_PMM2LA);
PCI_WRITEL(0, BAMBOO_PCIL0_PMM2PCILA);
PCI_WRITEL(0, BAMBOO_PCIL0_PMM2PCIHA);
PCI_WRITEL(0, BAMBOO_PCIL0_PMM2MA);
/* Now configure the PCI->PLB windows, we only use PTM1
*
* For Inbound flow, set the window size to all available memory
* This is required because if size is smaller,
* then Eth/PCI DD would fail as PCI card not able to access
* the memory allocated by DD.
*/
PCI_WRITEL(0, BAMBOO_PCIL0_PTM1MS); /* disabled region 1 */
PCI_WRITEL(0, BAMBOO_PCIL0_PTM1LA); /* begin of address map */
memory_size = 1 << fls(memory_size - 1);
/* Size low + Enabled */
PCI_WRITEL((0xffffffff - (memory_size - 1)) | 0x1, BAMBOO_PCIL0_PTM1MS);
eieio();
iounmap(pci_reg_base);
}
static void __init
bamboo_setup_hose(void)
{
unsigned int bar_response, bar;
struct pci_controller *hose;
bamboo_setup_pci();
hose = pcibios_alloc_controller();
if (!hose)
return;
hose->first_busno = 0;
hose->last_busno = 0xff;
hose->pci_mem_offset = BAMBOO_PCI_MEM_OFFSET;
pci_init_resource(&hose->io_resource,
BAMBOO_PCI_LOWER_IO,
BAMBOO_PCI_UPPER_IO,
IORESOURCE_IO,
"PCI host bridge");
pci_init_resource(&hose->mem_resources[0],
BAMBOO_PCI_LOWER_MEM,
BAMBOO_PCI_UPPER_MEM,
IORESOURCE_MEM,
"PCI host bridge");
ppc_md.pci_exclude_device = bamboo_exclude_device;
hose->io_space.start = BAMBOO_PCI_LOWER_IO;
hose->io_space.end = BAMBOO_PCI_UPPER_IO;
hose->mem_space.start = BAMBOO_PCI_LOWER_MEM;
hose->mem_space.end = BAMBOO_PCI_UPPER_MEM;
isa_io_base =
(unsigned long)ioremap64(BAMBOO_PCI_IO_BASE, BAMBOO_PCI_IO_SIZE);
hose->io_base_virt = (void *)isa_io_base;
setup_indirect_pci(hose,
BAMBOO_PCI_CFGA_PLB32,
BAMBOO_PCI_CFGD_PLB32);
hose->set_cfg_type = 1;
/* Zero config bars */
for (bar = PCI_BASE_ADDRESS_1; bar <= PCI_BASE_ADDRESS_2; bar += 4) {
early_write_config_dword(hose, hose->first_busno,
PCI_FUNC(hose->first_busno), bar,
0x00000000);
early_read_config_dword(hose, hose->first_busno,
PCI_FUNC(hose->first_busno), bar,
&bar_response);
}
hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
ppc_md.pci_swizzle = common_swizzle;
ppc_md.pci_map_irq = bamboo_map_irq;
}
TODC_ALLOC();
static void __init
bamboo_early_serial_map(void)
{
struct uart_port port;
/* Setup ioremapped serial port access */
memset(&port, 0, sizeof(port));
port.membase = ioremap64(PPC440EP_UART0_ADDR, 8);
port.irq = 0;
port.uartclk = clocks.uart0;
port.regshift = 0;
port.iotype = SERIAL_IO_MEM;
port.flags = ASYNC_BOOT_AUTOCONF | ASYNC_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);
#endif
port.membase = ioremap64(PPC440EP_UART1_ADDR, 8);
port.irq = 1;
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
port.membase = ioremap64(PPC440EP_UART2_ADDR, 8);
port.irq = 3;
port.uartclk = clocks.uart2;
port.line = 2;
if (early_serial_setup(&port) != 0) {
printk("Early serial init of port 2 failed\n");
}
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
/* Configure debug serial access */
gen550_init(2, &port);
#endif
port.membase = ioremap64(PPC440EP_UART3_ADDR, 8);
port.irq = 4;
port.uartclk = clocks.uart3;
port.line = 3;
if (early_serial_setup(&port) != 0) {
printk("Early serial init of port 3 failed\n");
}
}
static void __init
bamboo_setup_arch(void)
{
bamboo_set_emacdata();
ibm440gx_get_clocks(&clocks, 33333333, 6 * 1843200);
ocp_sys_info.opb_bus_freq = clocks.opb;
/* Setup TODC access */
TODC_INIT(TODC_TYPE_DS1743,
0,
0,
ioremap64(BAMBOO_RTC_ADDR, BAMBOO_RTC_SIZE),
8);
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000/HZ;
/* Setup PCI host bridge */
bamboo_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
bamboo_early_serial_map();
/* Identify the system */
printk("IBM Bamboo port (MontaVista Software, Inc. (source@mvista.com))\n");
}
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 = bamboo_setup_arch;
ppc_md.show_cpuinfo = bamboo_show_cpuinfo;
ppc_md.get_irq = NULL; /* Set in ppc4xx_pic_init() */
ppc_md.calibrate_decr = bamboo_calibrate_decr;
ppc_md.time_init = todc_time_init;
ppc_md.set_rtc_time = todc_set_rtc_time;
ppc_md.get_rtc_time = todc_get_rtc_time;
ppc_md.nvram_read_val = todc_direct_read_val;
ppc_md.nvram_write_val = todc_direct_write_val;
#ifdef CONFIG_KGDB
ppc_md.early_serial_map = bamboo_early_serial_map;
#endif
}
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