/*
* P1022DS board specific routines
*
* Authors : Travis Wheatley < travis . wheatley @ freescale . com >
* Dave Liu < daveliu @ freescale . com >
* Timur Tabi < timur @ freescale . com >
*
* Copyright 2010 Freescale Semiconductor , Inc .
*
* This file is taken from the Freescale P1022DS BSP , with modifications :
* 2 ) No AMP support
* 3 ) No PCI endpoint support
*
* This file is licensed under the terms of the GNU General Public License
* version 2 . This program is licensed " as is " without any warranty of any
* kind , whether express or implied .
*/
#include <linux/fsl/guts.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <asm /div64.h>
#include <asm /mpic.h>
#include <asm /swiotlb.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#include <asm /udbg.h>
#include <asm /fsl_lbc.h>
#include "smp.h"
#include "mpc85xx.h"
#if defined (CONFIG_FB_FSL_DIU) || defined (CONFIG_FB_FSL_DIU_MODULE)
#define PMUXCR_ELBCDIU_MASK 0 xc0000000
#define PMUXCR_ELBCDIU_NOR16 0 x80000000
#define PMUXCR_ELBCDIU_DIU 0 x40000000
/*
* Board - specific initialization of the DIU . This code should probably be
* executed when the DIU is opened , rather than in arch code , but the DIU
* driver does not have a mechanism for this ( yet ) .
*
* This is especially problematic on the P1022DS because the local bus ( eLBC )
* and the DIU video signals share the same pins , which means that enabling the
* DIU will disable access to NOR flash .
*/
/* DIU Pixel Clock bits of the CLKDVDR Global Utilities register */
#define CLKDVDR_PXCKEN 0 x80000000
#define CLKDVDR_PXCKINV 0 x10000000
#define CLKDVDR_PXCKDLY 0 x06000000
#define CLKDVDR_PXCLK_MASK 0 x00FF0000
/* Some ngPIXIS register definitions */
#define PX_CTL 3
#define PX_BRDCFG0 8
#define PX_BRDCFG1 9
#define PX_BRDCFG0_ELBC_SPI_MASK 0 xc0
#define PX_BRDCFG0_ELBC_SPI_ELBC 0 x00
#define PX_BRDCFG0_ELBC_SPI_NULL 0 xc0
#define PX_BRDCFG0_ELBC_DIU 0 x02
#define PX_BRDCFG1_DVIEN 0 x80
#define PX_BRDCFG1_DFPEN 0 x40
#define PX_BRDCFG1_BACKLIGHT 0 x20
#define PX_BRDCFG1_DDCEN 0 x10
#define PX_CTL_ALTACC 0 x80
/*
* DIU Area Descriptor
*
* Note that we need to byte - swap the value before it ' s written to the AD
* register . So even though the registers don ' t look like they ' re in the same
* bit positions as they are on the MPC8610 , the same value is written to the
* AD register on the MPC8610 and on the P1022 .
*/
#define AD_BYTE_F 0 x10000000
#define AD_ALPHA_C_MASK 0 x0E000000
#define AD_ALPHA_C_SHIFT 25
#define AD_BLUE_C_MASK 0 x01800000
#define AD_BLUE_C_SHIFT 23
#define AD_GREEN_C_MASK 0 x00600000
#define AD_GREEN_C_SHIFT 21
#define AD_RED_C_MASK 0 x00180000
#define AD_RED_C_SHIFT 19
#define AD_PALETTE 0 x00040000
#define AD_PIXEL_S_MASK 0 x00030000
#define AD_PIXEL_S_SHIFT 16
#define AD_COMP_3_MASK 0 x0000F000
#define AD_COMP_3_SHIFT 12
#define AD_COMP_2_MASK 0 x00000F00
#define AD_COMP_2_SHIFT 8
#define AD_COMP_1_MASK 0 x000000F0
#define AD_COMP_1_SHIFT 4
#define AD_COMP_0_MASK 0 x0000000F
#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))
struct fsl_law {
u32 lawbar;
u32 reserved1;
u32 lawar;
u32 reserved[5 ];
};
#define LAWBAR_MASK 0 x00F00000
#define LAWBAR_SHIFT 12
#define LAWAR_EN 0 x80000000
#define LAWAR_TGT_MASK 0 x01F00000
#define LAW_TRGT_IF_LBC (0 x04 << 20 )
#define LAWAR_MASK (LAWAR_EN | LAWAR_TGT_MASK)
#define LAWAR_MATCH (LAWAR_EN | LAW_TRGT_IF_LBC)
#define BR_BA 0 xFFFF8000
/*
* Map a BRx value to a physical address
*
* The localbus BRx registers only store the lower 32 bits of the address . To
* obtain the upper four bits , we need to scan the LAW table . The entry which
* maps to the localbus will contain the upper four bits .
*/
static phys_addr_t lbc_br_to_phys(const void *ecm, unsigned int count, u32 br)
{
#ifndef CONFIG_PHYS_64BIT
/*
* If we only have 32 - bit addressing , then the BRx address * is * the
* physical address .
*/
return br & BR_BA;
#else
const struct fsl_law *law = ecm + 0 xc08;
unsigned int i;
for (i = 0 ; i < count; i++) {
u64 lawbar = in_be32(&law[i].lawbar);
u32 lawar = in_be32(&law[i].lawar);
if ((lawar & LAWAR_MASK) == LAWAR_MATCH)
/* Extract the upper four bits */
return (br & BR_BA) | ((lawbar & LAWBAR_MASK) << 12 );
}
return 0 ;
#endif
}
/**
* p1022ds_set_monitor_port : switch the output to a different monitor port
*/
static void p1022ds_set_monitor_port(enum fsl_diu_monitor_port port)
{
struct device_node *guts_node;
struct device_node *lbc_node = NULL;
struct device_node *law_node = NULL;
struct ccsr_guts __iomem *guts;
struct fsl_lbc_regs *lbc = NULL;
void *ecm = NULL;
u8 __iomem *lbc_lcs0_ba = NULL;
u8 __iomem *lbc_lcs1_ba = NULL;
phys_addr_t cs0_addr, cs1_addr;
u32 br0, or0, br1, or1;
const __be32 *iprop;
unsigned int num_laws;
u8 b;
/* Map the global utilities registers. */
guts_node = of_find_compatible_node(NULL, NULL, "fsl,p1022-guts" );
if (!guts_node) {
pr_err("p1022ds: missing global utilities device node\n" );
return ;
}
guts = of_iomap(guts_node, 0 );
if (!guts) {
pr_err("p1022ds: could not map global utilities device\n" );
goto exit ;
}
lbc_node = of_find_compatible_node(NULL, NULL, "fsl,p1022-elbc" );
if (!lbc_node) {
pr_err("p1022ds: missing localbus node\n" );
goto exit ;
}
lbc = of_iomap(lbc_node, 0 );
if (!lbc) {
pr_err("p1022ds: could not map localbus node\n" );
goto exit ;
}
law_node = of_find_compatible_node(NULL, NULL, "fsl,ecm-law" );
if (!law_node) {
pr_err("p1022ds: missing local access window node\n" );
goto exit ;
}
ecm = of_iomap(law_node, 0 );
if (!ecm) {
pr_err("p1022ds: could not map local access window node\n" );
goto exit ;
}
iprop = of_get_property(law_node, "fsl,num-laws" , NULL);
if (!iprop) {
pr_err("p1022ds: LAW node is missing fsl,num-laws property\n" );
goto exit ;
}
num_laws = be32_to_cpup(iprop);
/*
* Indirect mode requires both BR0 and BR1 to be set to " GPCM " ,
* otherwise writes to these addresses won ' t actually appear on the
* local bus , and so the PIXIS won ' t see them .
*
* In FCM mode , writes go to the NAND controller , which does not pass
* them to the localbus directly . So we force BR0 and BR1 into GPCM
* mode , since we don ' t care about what ' s behind the localbus any
* more .
*/
br0 = in_be32(&lbc->bank[0 ].br);
br1 = in_be32(&lbc->bank[1 ].br);
or0 = in_be32(&lbc->bank[0 ].or );
or1 = in_be32(&lbc->bank[1 ].or );
/* Make sure CS0 and CS1 are programmed */
if (!(br0 & BR_V) || !(br1 & BR_V)) {
pr_err("p1022ds: CS0 and/or CS1 is not programmed\n" );
goto exit ;
}
/*
* Use the existing BRx / ORx values if it ' s already GPCM . Otherwise ,
* force the values to simple 32 KB GPCM windows with the most
* conservative timing .
*/
if ((br0 & BR_MSEL) != BR_MS_GPCM) {
br0 = (br0 & BR_BA) | BR_V;
or0 = 0 xFFFF8000 | 0 xFF7;
out_be32(&lbc->bank[0 ].br, br0);
out_be32(&lbc->bank[0 ].or , or0);
}
if ((br1 & BR_MSEL) != BR_MS_GPCM) {
br1 = (br1 & BR_BA) | BR_V;
or1 = 0 xFFFF8000 | 0 xFF7;
out_be32(&lbc->bank[1 ].br, br1);
out_be32(&lbc->bank[1 ].or , or1);
}
cs0_addr = lbc_br_to_phys(ecm, num_laws, br0);
if (!cs0_addr) {
pr_err("p1022ds: could not determine physical address for CS0"
" (BR0=%08x)\n" , br0);
goto exit ;
}
cs1_addr = lbc_br_to_phys(ecm, num_laws, br1);
if (!cs1_addr) {
pr_err("p1022ds: could not determine physical address for CS1"
" (BR1=%08x)\n" , br1);
goto exit ;
}
lbc_lcs0_ba = ioremap(cs0_addr, 1 );
if (!lbc_lcs0_ba) {
pr_err("p1022ds: could not ioremap CS0 address %llx\n" ,
(unsigned long long )cs0_addr);
goto exit ;
}
lbc_lcs1_ba = ioremap(cs1_addr, 1 );
if (!lbc_lcs1_ba) {
pr_err("p1022ds: could not ioremap CS1 address %llx\n" ,
(unsigned long long )cs1_addr);
goto exit ;
}
/* Make sure we're in indirect mode first. */
if ((in_be32(&guts->pmuxcr) & PMUXCR_ELBCDIU_MASK) !=
PMUXCR_ELBCDIU_DIU) {
struct device_node *pixis_node;
void __iomem *pixis;
pixis_node =
of_find_compatible_node(NULL, NULL, "fsl,p1022ds-fpga" );
if (!pixis_node) {
pr_err("p1022ds: missing pixis node\n" );
goto exit ;
}
pixis = of_iomap(pixis_node, 0 );
of_node_put(pixis_node);
if (!pixis) {
pr_err("p1022ds: could not map pixis registers\n" );
goto exit ;
}
/* Enable indirect PIXIS mode. */
setbits8(pixis + PX_CTL, PX_CTL_ALTACC);
iounmap(pixis);
/* Switch the board mux to the DIU */
out_8(lbc_lcs0_ba, PX_BRDCFG0); /* BRDCFG0 */
b = in_8(lbc_lcs1_ba);
b |= PX_BRDCFG0_ELBC_DIU;
out_8(lbc_lcs1_ba, b);
/* Set the chip mux to DIU mode. */
clrsetbits_be32(&guts->pmuxcr, PMUXCR_ELBCDIU_MASK,
PMUXCR_ELBCDIU_DIU);
in_be32(&guts->pmuxcr);
}
switch (port) {
case FSL_DIU_PORT_DVI:
/* Enable the DVI port, disable the DFP and the backlight */
out_8(lbc_lcs0_ba, PX_BRDCFG1);
b = in_8(lbc_lcs1_ba);
b &= ~(PX_BRDCFG1_DFPEN | PX_BRDCFG1_BACKLIGHT);
b |= PX_BRDCFG1_DVIEN;
out_8(lbc_lcs1_ba, b);
break ;
case FSL_DIU_PORT_LVDS:
/*
* LVDS also needs backlight enabled , otherwise the display
* will be blank .
*/
/* Enable the DFP port, disable the DVI and the backlight */
out_8(lbc_lcs0_ba, PX_BRDCFG1);
b = in_8(lbc_lcs1_ba);
b &= ~PX_BRDCFG1_DVIEN;
b |= PX_BRDCFG1_DFPEN | PX_BRDCFG1_BACKLIGHT;
out_8(lbc_lcs1_ba, b);
break ;
default :
pr_err("p1022ds: unsupported monitor port %i\n" , port);
}
exit :
if (lbc_lcs1_ba)
iounmap(lbc_lcs1_ba);
if (lbc_lcs0_ba)
iounmap(lbc_lcs0_ba);
if (lbc)
iounmap(lbc);
if (ecm)
iounmap(ecm);
if (guts)
iounmap(guts);
of_node_put(law_node);
of_node_put(lbc_node);
of_node_put(guts_node);
}
/**
* p1022ds_set_pixel_clock : program the DIU ' s clock
*
* @ pixclock : the wavelength , in picoseconds , of the clock
*/
static void p1022ds_set_pixel_clock(unsigned int pixclock)
{
struct device_node *guts_np = NULL;
struct ccsr_guts __iomem *guts;
unsigned long freq;
u64 temp;
u32 pxclk;
/* Map the global utilities registers. */
guts_np = of_find_compatible_node(NULL, NULL, "fsl,p1022-guts" );
if (!guts_np) {
pr_err("p1022ds: missing global utilities device node\n" );
return ;
}
guts = of_iomap(guts_np, 0 );
of_node_put(guts_np);
if (!guts) {
pr_err("p1022ds: could not map global utilities device\n" );
return ;
}
/* Convert pixclock from a wavelength to a frequency */
temp = 1000000000000 ULL;
do_div(temp, pixclock);
freq = temp;
/*
* ' pxclk ' is the ratio of the platform clock to the pixel clock .
* This number is programmed into the CLKDVDR register , and the valid
* range of values is 2 - 255 .
*/
pxclk = DIV_ROUND_CLOSEST(fsl_get_sys_freq(), freq);
pxclk = clamp_t(u32, pxclk, 2 , 255 );
/* 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);
}
/**
* p1022ds_valid_monitor_port : set the monitor port for sysfs
*/
static enum fsl_diu_monitor_port
p1022ds_valid_monitor_port(enum fsl_diu_monitor_port port)
{
switch (port) {
case FSL_DIU_PORT_DVI:
case FSL_DIU_PORT_LVDS:
return port;
default :
return FSL_DIU_PORT_DVI; /* Dual-link LVDS is not supported */
}
}
#endif
static void __init p1022_ds_pic_init(void )
{
struct mpic *mpic = mpic_alloc(NULL, 0 , MPIC_BIG_ENDIAN |
MPIC_SINGLE_DEST_CPU,
0 , 256 , " OpenPIC " );
BUG_ON(mpic == NULL);
mpic_init(mpic);
}
#if defined (CONFIG_FB_FSL_DIU) || defined (CONFIG_FB_FSL_DIU_MODULE)
/* TRUE if there is a "video=fslfb" command-line parameter. */
static bool fslfb;
/*
* Search for a " video = fslfb " command - line parameter , and set ' fslfb ' to
* true if we find it .
*
* We need to use early_param ( ) instead of _ _ setup ( ) because the normal
* _ _ setup ( ) gets called to late . However , early_param ( ) gets called very
* early , before the device tree is unflattened , so all we can do now is set a
* global variable . Later on , p1022_ds_setup_arch ( ) will use that variable
* to determine if we need to update the device tree .
*/
static int __init early_video_setup(char *options)
{
fslfb = (strncmp(options, "fslfb:" , 6 ) == 0 );
return 0 ;
}
early_param("video" , early_video_setup);
#endif
/*
* Setup the architecture
*/
static void __init p1022_ds_setup_arch(void )
{
if (ppc_md.progress)
ppc_md.progress("p1022_ds_setup_arch()" , 0 );
#if defined (CONFIG_FB_FSL_DIU) || defined (CONFIG_FB_FSL_DIU_MODULE)
diu_ops.set_monitor_port = p1022ds_set_monitor_port;
diu_ops.set_pixel_clock = p1022ds_set_pixel_clock;
diu_ops.valid_monitor_port = p1022ds_valid_monitor_port;
/*
* Disable the NOR and NAND flash nodes if there is video = fslfb . . .
* command - line parameter . When the DIU is active , the localbus is
* unavailable , so we have to disable these nodes before the MTD
* driver loads .
*/
if (fslfb) {
struct device_node *np =
of_find_compatible_node(NULL, NULL, "fsl,p1022-elbc" );
if (np) {
struct device_node *np2;
of_node_get(np);
np2 = of_find_compatible_node(np, NULL, "cfi-flash" );
if (np2) {
static struct property nor_status = {
.name = "status" ,
.value = "disabled" ,
.length = sizeof ("disabled" ),
};
/*
* of_update_property ( ) is called before
* kmalloc ( ) is available , so the ' new ' object
* should be allocated in the global area .
* The easiest way is to do that is to
* allocate one static local variable for each
* call to this function .
*/
pr_info("p1022ds: disabling %pOF node" ,
np2);
of_update_property(np2, &nor_status);
of_node_put(np2);
}
of_node_get(np);
np2 = of_find_compatible_node(np, NULL,
"fsl,elbc-fcm-nand" );
if (np2) {
static struct property nand_status = {
.name = "status" ,
.value = "disabled" ,
.length = sizeof ("disabled" ),
};
pr_info("p1022ds: disabling %pOF node" ,
np2);
of_update_property(np2, &nand_status);
of_node_put(np2);
}
of_node_put(np);
}
}
#endif
mpc85xx_smp_init();
fsl_pci_assign_primary();
swiotlb_detect_4g();
pr_info("Freescale P1022 DS reference board\n" );
}
machine_arch_initcall(p1022_ds, mpc85xx_common_publish_devices);
define_machine(p1022_ds) {
.name = "P1022 DS" ,
.compatible = "fsl,p1022ds" ,
.setup_arch = p1022_ds_setup_arch,
.init_IRQ = p1022_ds_pic_init,
#ifdef CONFIG_PCI
.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
.pcibios_fixup_phb = fsl_pcibios_fixup_phb,
#endif
.get_irq = mpic_get_irq,
.progress = udbg_progress,
};
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