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-rw-r--r--arch/powerpc/platforms/85xx/p1022_ds.c571
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diff --git a/arch/powerpc/platforms/85xx/p1022_ds.c b/arch/powerpc/platforms/85xx/p1022_ds.c
new file mode 100644
index 000000000..1f1af0557
--- /dev/null
+++ b/arch/powerpc/platforms/85xx/p1022_ds.c
@@ -0,0 +1,571 @@
+/*
+ * 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_platform.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 0xc0000000
+#define PMUXCR_ELBCDIU_NOR16 0x80000000
+#define PMUXCR_ELBCDIU_DIU 0x40000000
+
+/*
+ * 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 0x80000000
+#define CLKDVDR_PXCKINV 0x10000000
+#define CLKDVDR_PXCKDLY 0x06000000
+#define CLKDVDR_PXCLK_MASK 0x00FF0000
+
+/* Some ngPIXIS register definitions */
+#define PX_CTL 3
+#define PX_BRDCFG0 8
+#define PX_BRDCFG1 9
+
+#define PX_BRDCFG0_ELBC_SPI_MASK 0xc0
+#define PX_BRDCFG0_ELBC_SPI_ELBC 0x00
+#define PX_BRDCFG0_ELBC_SPI_NULL 0xc0
+#define PX_BRDCFG0_ELBC_DIU 0x02
+
+#define PX_BRDCFG1_DVIEN 0x80
+#define PX_BRDCFG1_DFPEN 0x40
+#define PX_BRDCFG1_BACKLIGHT 0x20
+#define PX_BRDCFG1_DDCEN 0x10
+
+#define PX_CTL_ALTACC 0x80
+
+/*
+ * 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 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))
+
+struct fsl_law {
+ u32 lawbar;
+ u32 reserved1;
+ u32 lawar;
+ u32 reserved[5];
+};
+
+#define LAWBAR_MASK 0x00F00000
+#define LAWBAR_SHIFT 12
+
+#define LAWAR_EN 0x80000000
+#define LAWAR_TGT_MASK 0x01F00000
+#define LAW_TRGT_IF_LBC (0x04 << 20)
+
+#define LAWAR_MASK (LAWAR_EN | LAWAR_TGT_MASK)
+#define LAWAR_MATCH (LAWAR_EN | LAW_TRGT_IF_LBC)
+
+#define BR_BA 0xFFFF8000
+
+/*
+ * 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 + 0xc08;
+ 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 32KB GPCM windows with the most
+ * conservative timing.
+ */
+ if ((br0 & BR_MSEL) != BR_MS_GPCM) {
+ br0 = (br0 & BR_BA) | BR_V;
+ or0 = 0xFFFF8000 | 0xFF7;
+ 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 = 0xFFFF8000 | 0xFF7;
+ 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
+ */
+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 = 1000000000000ULL;
+ 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
+ */
+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
+
+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);
+
+/*
+ * Called very early, device-tree isn't unflattened
+ */
+static int __init p1022_ds_probe(void)
+{
+ return of_machine_is_compatible("fsl,p1022ds");
+}
+
+define_machine(p1022_ds) {
+ .name = "P1022 DS",
+ .probe = p1022_ds_probe,
+ .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,
+ .calibrate_decr = generic_calibrate_decr,
+ .progress = udbg_progress,
+};
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