linux/arch/powerpc/platforms/86xx/mpc8610_hpcd.c

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/*
* MPC8610 HPCD board specific routines
*
* Initial author: Xianghua Xiao <x.xiao@freescale.com>
* Recode: Jason Jin <jason.jin@freescale.com>
* York Sun <yorksun@freescale.com>
*
* Rewrite the interrupt routing. remove the 8259PIC support,
* All the integrated device in ULI use sideband interrupt.
*
* Copyright 2008 Freescale Semiconductor 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/stddef.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/of.h>
#include <asm/system.h>
#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <asm/mpc86xx.h>
#include <asm/prom.h>
#include <mm/mmu_decl.h>
#include <asm/udbg.h>
#include <asm/mpic.h>
#include <linux/of_platform.h>
#include <sysdev/fsl_pci.h>
#include <sysdev/fsl_soc.h>
static unsigned char *pixis_bdcfg0, *pixis_arch;
static struct of_device_id __initdata mpc8610_ids[] = {
{ .compatible = "fsl,mpc8610-immr", },
{}
};
static int __init mpc8610_declare_of_platform_devices(void)
{
/* Without this call, the SSI device driver won't get probed. */
of_platform_bus_probe(NULL, mpc8610_ids, NULL);
return 0;
}
machine_device_initcall(mpc86xx_hpcd, mpc8610_declare_of_platform_devices);
static void __init mpc86xx_hpcd_init_irq(void)
{
struct mpic *mpic1;
struct device_node *np;
struct resource res;
/* Determine PIC address. */
np = of_find_node_by_type(NULL, "open-pic");
if (np == NULL)
return;
of_address_to_resource(np, 0, &res);
/* Alloc mpic structure and per isu has 16 INT entries. */
mpic1 = mpic_alloc(np, res.start,
MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
0, 256, " MPIC ");
BUG_ON(mpic1 == NULL);
mpic_init(mpic1);
}
#ifdef CONFIG_PCI
static void __devinit quirk_uli1575(struct pci_dev *dev)
{
u32 temp32;
/* Disable INTx */
pci_read_config_dword(dev, 0x48, &temp32);
pci_write_config_dword(dev, 0x48, (temp32 | 1<<26));
/* Enable sideband interrupt */
pci_read_config_dword(dev, 0x90, &temp32);
pci_write_config_dword(dev, 0x90, (temp32 | 1<<22));
}
static void __devinit quirk_uli5288(struct pci_dev *dev)
{
unsigned char c;
unsigned short temp;
/* Interrupt Disable, Needed when SATA disabled */
pci_read_config_word(dev, PCI_COMMAND, &temp);
temp |= 1<<10;
pci_write_config_word(dev, PCI_COMMAND, temp);
pci_read_config_byte(dev, 0x83, &c);
c |= 0x80;
pci_write_config_byte(dev, 0x83, c);
pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01);
pci_write_config_byte(dev, PCI_CLASS_DEVICE, 0x06);
pci_read_config_byte(dev, 0x83, &c);
c &= 0x7f;
pci_write_config_byte(dev, 0x83, c);
}
/*
* Since 8259PIC was disabled on the board, the IDE device can not
* use the legacy IRQ, we need to let the IDE device work under
* native mode and use the interrupt line like other PCI devices.
* IRQ14 is a sideband interrupt from IDE device to CPU and we use this
* as the interrupt for IDE device.
*/
static void __devinit quirk_uli5229(struct pci_dev *dev)
{
unsigned char c;
pci_read_config_byte(dev, 0x4b, &c);
c |= 0x10;
pci_write_config_byte(dev, 0x4b, c);
}
/*
* SATA interrupt pin bug fix
* There's a chip bug for 5288, The interrupt pin should be 2,
* not the read only value 1, So it use INTB#, not INTA# which
* actually used by the IDE device 5229.
* As of this bug, during the PCI initialization, 5288 read the
* irq of IDE device from the device tree, this function fix this
* bug by re-assigning a correct irq to 5288.
*
*/
static void __devinit final_uli5288(struct pci_dev *dev)
{
struct pci_controller *hose = pci_bus_to_host(dev->bus);
struct device_node *hosenode = hose ? hose->dn : NULL;
struct of_irq oirq;
int virq, pin = 2;
u32 laddr[3];
if (!hosenode)
return;
laddr[0] = (hose->first_busno << 16) | (PCI_DEVFN(31, 0) << 8);
laddr[1] = laddr[2] = 0;
of_irq_map_raw(hosenode, &pin, 1, laddr, &oirq);
virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
oirq.size);
dev->irq = virq;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, quirk_uli1575);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, quirk_uli5288);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5288, final_uli5288);
#endif /* CONFIG_PCI */
#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
static u32 get_busfreq(void)
{
struct device_node *node;
u32 fs_busfreq = 0;
node = of_find_node_by_type(NULL, "cpu");
if (node) {
unsigned int size;
const unsigned int *prop =
of_get_property(node, "bus-frequency", &size);
if (prop)
fs_busfreq = *prop;
of_node_put(node);
};
return fs_busfreq;
}
unsigned int mpc8610hpcd_get_pixel_format(unsigned int bits_per_pixel,
int monitor_port)
{
static const unsigned long pixelformat[][3] = {
{0x88882317, 0x88083218, 0x65052119},
{0x88883316, 0x88082219, 0x65053118},
};
unsigned int pix_fmt, arch_monitor;
arch_monitor = ((*pixis_arch == 0x01) && (monitor_port == 0))? 0 : 1;
/* DVI port for board version 0x01 */
if (bits_per_pixel == 32)
pix_fmt = pixelformat[arch_monitor][0];
else if (bits_per_pixel == 24)
pix_fmt = pixelformat[arch_monitor][1];
else if (bits_per_pixel == 16)
pix_fmt = pixelformat[arch_monitor][2];
else
pix_fmt = pixelformat[1][0];
return pix_fmt;
}
void mpc8610hpcd_set_gamma_table(int monitor_port, char *gamma_table_base)
{
int i;
if (monitor_port == 2) { /* dual link LVDS */
for (i = 0; i < 256*3; i++)
gamma_table_base[i] = (gamma_table_base[i] << 2) |
((gamma_table_base[i] >> 6) & 0x03);
}
}
void mpc8610hpcd_set_monitor_port(int monitor_port)
{
static const u8 bdcfg[] = {0xBD, 0xB5, 0xA5};
if (monitor_port < 3)
*pixis_bdcfg0 = bdcfg[monitor_port];
}
void mpc8610hpcd_set_pixel_clock(unsigned int pixclock)
{
u32 __iomem *clkdvdr;
u32 temp;
/* variables for pixel clock calcs */
ulong bestval, bestfreq, speed_ccb, minpixclock, maxpixclock;
ulong pixval;
long err;
int i;
clkdvdr = ioremap(get_immrbase() + 0xe0800, sizeof(u32));
if (!clkdvdr) {
printk(KERN_ERR "Err: can't map clock divider register!\n");
return;
}
/* Pixel Clock configuration */
pr_debug("DIU: Bus Frequency = %d\n", get_busfreq());
speed_ccb = get_busfreq();
/* Calculate the pixel clock with the smallest error */
/* calculate the following in steps to avoid overflow */
pr_debug("DIU pixclock in ps - %d\n", pixclock);
temp = 1000000000/pixclock;
temp *= 1000;
pixclock = temp;
pr_debug("DIU pixclock freq - %u\n", pixclock);
temp = pixclock * 5 / 100;
pr_debug("deviation = %d\n", temp);
minpixclock = pixclock - temp;
maxpixclock = pixclock + temp;
pr_debug("DIU minpixclock - %lu\n", minpixclock);
pr_debug("DIU maxpixclock - %lu\n", maxpixclock);
pixval = speed_ccb/pixclock;
pr_debug("DIU pixval = %lu\n", pixval);
err = 100000000;
bestval = pixval;
pr_debug("DIU bestval = %lu\n", bestval);
bestfreq = 0;
for (i = -1; i <= 1; i++) {
temp = speed_ccb / ((pixval+i) + 1);
pr_debug("DIU test pixval i= %d, pixval=%lu, temp freq. = %u\n",
i, pixval, temp);
if ((temp < minpixclock) || (temp > maxpixclock))
pr_debug("DIU exceeds monitor range (%lu to %lu)\n",
minpixclock, maxpixclock);
else if (abs(temp - pixclock) < err) {
pr_debug("Entered the else if block %d\n", i);
err = abs(temp - pixclock);
bestval = pixval+i;
bestfreq = temp;
}
}
pr_debug("DIU chose = %lx\n", bestval);
pr_debug("DIU error = %ld\n NomPixClk ", err);
pr_debug("DIU: Best Freq = %lx\n", bestfreq);
/* Modify PXCLK in GUTS CLKDVDR */
pr_debug("DIU: Current value of CLKDVDR = 0x%08x\n", (*clkdvdr));
temp = (*clkdvdr) & 0x2000FFFF;
*clkdvdr = temp; /* turn off clock */
*clkdvdr = temp | 0x80000000 | (((bestval) & 0x1F) << 16);
pr_debug("DIU: Modified value of CLKDVDR = 0x%08x\n", (*clkdvdr));
iounmap(clkdvdr);
}
ssize_t mpc8610hpcd_show_monitor_port(int monitor_port, char *buf)
{
return snprintf(buf, PAGE_SIZE,
"%c0 - DVI\n"
"%c1 - Single link LVDS\n"
"%c2 - Dual link LVDS\n",
monitor_port == 0 ? '*' : ' ',
monitor_port == 1 ? '*' : ' ',
monitor_port == 2 ? '*' : ' ');
}
int mpc8610hpcd_set_sysfs_monitor_port(int val)
{
return val < 3 ? val : 0;
}
#endif
static void __init mpc86xx_hpcd_setup_arch(void)
{
struct resource r;
struct device_node *np;
unsigned char *pixis;
if (ppc_md.progress)
ppc_md.progress("mpc86xx_hpcd_setup_arch()", 0);
#ifdef CONFIG_PCI
for_each_node_by_type(np, "pci") {
if (of_device_is_compatible(np, "fsl,mpc8610-pci")
|| of_device_is_compatible(np, "fsl,mpc8641-pcie")) {
struct resource rsrc;
of_address_to_resource(np, 0, &rsrc);
if ((rsrc.start & 0xfffff) == 0xa000)
fsl_add_bridge(np, 1);
else
fsl_add_bridge(np, 0);
}
}
#endif
#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
preallocate_diu_videomemory();
diu_ops.get_pixel_format = mpc8610hpcd_get_pixel_format;
diu_ops.set_gamma_table = mpc8610hpcd_set_gamma_table;
diu_ops.set_monitor_port = mpc8610hpcd_set_monitor_port;
diu_ops.set_pixel_clock = mpc8610hpcd_set_pixel_clock;
diu_ops.show_monitor_port = mpc8610hpcd_show_monitor_port;
diu_ops.set_sysfs_monitor_port = mpc8610hpcd_set_sysfs_monitor_port;
#endif
np = of_find_compatible_node(NULL, NULL, "fsl,fpga-pixis");
if (np) {
of_address_to_resource(np, 0, &r);
of_node_put(np);
pixis = ioremap(r.start, 32);
if (!pixis) {
printk(KERN_ERR "Err: can't map FPGA cfg register!\n");
return;
}
pixis_bdcfg0 = pixis + 8;
pixis_arch = pixis + 1;
} else
printk(KERN_ERR "Err: "
"can't find device node 'fsl,fpga-pixis'\n");
printk("MPC86xx HPCD board from Freescale Semiconductor\n");
}
/*
* Called very early, device-tree isn't unflattened
*/
static int __init mpc86xx_hpcd_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (of_flat_dt_is_compatible(root, "fsl,MPC8610HPCD"))
return 1; /* Looks good */
return 0;
}
static long __init mpc86xx_time_init(void)
{
unsigned int temp;
/* Set the time base to zero */
mtspr(SPRN_TBWL, 0);
mtspr(SPRN_TBWU, 0);
temp = mfspr(SPRN_HID0);
temp |= HID0_TBEN;
mtspr(SPRN_HID0, temp);
asm volatile("isync");
return 0;
}
define_machine(mpc86xx_hpcd) {
.name = "MPC86xx HPCD",
.probe = mpc86xx_hpcd_probe,
.setup_arch = mpc86xx_hpcd_setup_arch,
.init_IRQ = mpc86xx_hpcd_init_irq,
.get_irq = mpic_get_irq,
.restart = fsl_rstcr_restart,
.time_init = mpc86xx_time_init,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
};