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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/interrupt.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/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>
#include <sysdev/simple_gpio.h>
#include <asm/fsl_guts.h>
#include "mpc86xx.h"
static struct device_node *pixis_node;
static unsigned char *pixis_bdcfg0, *pixis_arch;
/* DIU Pixel Clock bits of the CLKDVDR Global Utilities register */
#define CLKDVDR_PXCKEN 0x80000000
#define CLKDVDR_PXCKINV 0x10000000
#define CLKDVDR_PXCKDLY 0x06000000
#define CLKDVDR_PXCLK_MASK 0x001F0000
#ifdef CONFIG_SUSPEND
static irqreturn_t mpc8610_sw9_irq(int irq, void *data)
{
pr_debug("%s: PIXIS' event (sw9/wakeup) IRQ handled\n", __func__);
return IRQ_HANDLED;
}
static void __init mpc8610_suspend_init(void)
{
int irq;
int ret;
if (!pixis_node)
return;
irq = irq_of_parse_and_map(pixis_node, 0);
if (!irq) {
pr_err("%s: can't map pixis event IRQ.\n", __func__);
return;
}
ret = request_irq(irq, mpc8610_sw9_irq, 0, "sw9:wakeup", NULL);
if (ret) {
pr_err("%s: can't request pixis event IRQ: %d\n",
__func__, ret);
irq_dispose_mapping(irq);
}
enable_irq_wake(irq);
}
#else
static inline void mpc8610_suspend_init(void) { }
#endif /* CONFIG_SUSPEND */
static struct of_device_id __initdata mpc8610_ids[] = {
{ .compatible = "fsl,mpc8610-immr", },
{ .compatible = "fsl,mpc8610-guts", },
{ .compatible = "simple-bus", },
/* So that the DMA channel nodes can be probed individually: */
{ .compatible = "fsl,eloplus-dma", },
{}
};
static int __init mpc8610_declare_of_platform_devices(void)
{
/* Firstly, register PIXIS GPIOs. */
simple_gpiochip_init("fsl,fpga-pixis-gpio-bank");
/* Enable wakeup on PIXIS' event IRQ. */
mpc8610_suspend_init();
/* 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);
#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
/*
* DIU Area Descriptor
*
* The MPC8610 reference manual shows the bits of the AD register in
* little-endian order, which causes the BLUE_C field to be split into two
* parts. To simplify the definition of the MAKE_AD() macro, we define the
* fields in big-endian order and byte-swap the result.
*
* So even though the registers don't look like they're in the
* same bit positions as they are on the P1022, the same value is written to
* the AD register on the MPC8610 and on the P1022.
*/
#define AD_BYTE_F 0x10000000
#define AD_ALPHA_C_MASK 0x0E000000
#define AD_ALPHA_C_SHIFT 25
#define AD_BLUE_C_MASK 0x01800000
#define AD_BLUE_C_SHIFT 23
#define AD_GREEN_C_MASK 0x00600000
#define AD_GREEN_C_SHIFT 21
#define AD_RED_C_MASK 0x00180000
#define AD_RED_C_SHIFT 19
#define AD_PALETTE 0x00040000
#define AD_PIXEL_S_MASK 0x00030000
#define AD_PIXEL_S_SHIFT 16
#define AD_COMP_3_MASK 0x0000F000
#define AD_COMP_3_SHIFT 12
#define AD_COMP_2_MASK 0x00000F00
#define AD_COMP_2_SHIFT 8
#define AD_COMP_1_MASK 0x000000F0
#define AD_COMP_1_SHIFT 4
#define AD_COMP_0_MASK 0x0000000F
#define AD_COMP_0_SHIFT 0
#define MAKE_AD(alpha, red, blue, green, size, c0, c1, c2, c3) \
cpu_to_le32(AD_BYTE_F | (alpha << AD_ALPHA_C_SHIFT) | \
(blue << AD_BLUE_C_SHIFT) | (green << AD_GREEN_C_SHIFT) | \
(red << AD_RED_C_SHIFT) | (c3 << AD_COMP_3_SHIFT) | \
(c2 << AD_COMP_2_SHIFT) | (c1 << AD_COMP_1_SHIFT) | \
(c0 << AD_COMP_0_SHIFT) | (size << AD_PIXEL_S_SHIFT))
unsigned int mpc8610hpcd_get_pixel_format(unsigned int bits_per_pixel,
int monitor_port)
{
static const unsigned long pixelformat[][3] = {
{
MAKE_AD(3, 0, 2, 1, 3, 8, 8, 8, 8),
MAKE_AD(4, 2, 0, 1, 2, 8, 8, 8, 0),
MAKE_AD(4, 0, 2, 1, 1, 5, 6, 5, 0)
},
{
MAKE_AD(3, 2, 0, 1, 3, 8, 8, 8, 8),
MAKE_AD(4, 0, 2, 1, 2, 8, 8, 8, 0),
MAKE_AD(4, 2, 0, 1, 1, 5, 6, 5, 0)
},
};
unsigned int arch_monitor;
/* The DVI port is mis-wired on revision 1 of this board. */
arch_monitor = ((*pixis_arch == 0x01) && (monitor_port == 0))? 0 : 1;
switch (bits_per_pixel) {
case 32:
return pixelformat[arch_monitor][0];
case 24:
return pixelformat[arch_monitor][1];
case 16:
return pixelformat[arch_monitor][2];
default:
pr_err("fsl-diu: unsupported pixel depth %u\n", bits_per_pixel);
return 0;
}
}
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);
}
}
#define PX_BRDCFG0_DVISEL (1 << 3)
#define PX_BRDCFG0_DLINK (1 << 4)
#define PX_BRDCFG0_DIU_MASK (PX_BRDCFG0_DVISEL | PX_BRDCFG0_DLINK)
void mpc8610hpcd_set_monitor_port(int monitor_port)
{
static const u8 bdcfg[] = {
PX_BRDCFG0_DVISEL | PX_BRDCFG0_DLINK,
PX_BRDCFG0_DLINK,
0,
};
if (monitor_port < 3)
clrsetbits_8(pixis_bdcfg0, PX_BRDCFG0_DIU_MASK,
bdcfg[monitor_port]);
}
/**
* mpc8610hpcd_set_pixel_clock: program the DIU's clock
*
* @pixclock: the wavelength, in picoseconds, of the clock
*/
void mpc8610hpcd_set_pixel_clock(unsigned int pixclock)
{
struct device_node *guts_np = NULL;
struct ccsr_guts_86xx __iomem *guts;
unsigned long freq;
u64 temp;
u32 pxclk;
/* Map the global utilities registers. */
guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts");
if (!guts_np) {
pr_err("mpc8610hpcd: missing global utilties device node\n");
return;
}
guts = of_iomap(guts_np, 0);
of_node_put(guts_np);
if (!guts) {
pr_err("mpc8610hpcd: could not map global utilties device\n");
return;
}
/* Convert pixclock from a wavelength to a frequency */
temp = 1000000000000ULL;
do_div(temp, pixclock);
freq = temp;
/*
* 'pxclk' is the ratio of the platform clock to the pixel clock.
* On the MPC8610, the value programmed into CLKDVDR is the ratio
* minus one. The valid range of values is 2-31.
*/
pxclk = DIV_ROUND_CLOSEST(fsl_get_sys_freq(), freq) - 1;
pxclk = clamp_t(u32, pxclk, 2, 31);
/* Disable the pixel clock, and set it to non-inverted and no delay */
clrbits32(&guts->clkdvdr,
CLKDVDR_PXCKEN | CLKDVDR_PXCKDLY | CLKDVDR_PXCLK_MASK);
/* Enable the clock and set the pxclk */
setbits32(&guts->clkdvdr, CLKDVDR_PXCKEN | (pxclk << 16));
iounmap(guts);
}
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)
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
pixis_node = of_find_compatible_node(NULL, NULL, "fsl,fpga-pixis");
if (pixis_node) {
of_address_to_resource(pixis_node, 0, &r);
of_node_put(pixis_node);
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_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,
};