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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm/mach-rpc/include
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-rpc/include')
-rw-r--r--arch/arm/mach-rpc/include/mach/acornfb.h137
-rw-r--r--arch/arm/mach-rpc/include/mach/hardware.h73
-rw-r--r--arch/arm/mach-rpc/include/mach/io.h28
-rw-r--r--arch/arm/mach-rpc/include/mach/irqs.h42
-rw-r--r--arch/arm/mach-rpc/include/mach/isa-dma.h26
-rw-r--r--arch/arm/mach-rpc/include/mach/memory.h32
-rw-r--r--arch/arm/mach-rpc/include/mach/uncompress.h181
7 files changed, 519 insertions, 0 deletions
diff --git a/arch/arm/mach-rpc/include/mach/acornfb.h b/arch/arm/mach-rpc/include/mach/acornfb.h
new file mode 100644
index 0000000000..2bf18ab3d6
--- /dev/null
+++ b/arch/arm/mach-rpc/include/mach/acornfb.h
@@ -0,0 +1,137 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/mach-rpc/include/mach/acornfb.h
+ *
+ * Copyright (C) 1999 Russell King
+ *
+ * AcornFB architecture specific code
+ */
+
+#define acornfb_bandwidth(var) ((var)->pixclock * 8 / (var)->bits_per_pixel)
+
+static inline int
+acornfb_valid_pixrate(struct fb_var_screeninfo *var)
+{
+ u_long limit;
+
+ if (!var->pixclock)
+ return 0;
+
+ /*
+ * Limits below are taken from RISC OS bandwidthlimit file
+ */
+ if (current_par.using_vram) {
+ if (current_par.vram_half_sam == 2048)
+ limit = 6578;
+ else
+ limit = 13157;
+ } else {
+ limit = 26315;
+ }
+
+ return acornfb_bandwidth(var) >= limit;
+}
+
+/*
+ * Try to find the best PLL parameters for the pixel clock.
+ * This algorithm seems to give best predictable results,
+ * and produces the same values as detailed in the VIDC20
+ * data sheet.
+ */
+static inline u_int
+acornfb_vidc20_find_pll(u_int pixclk)
+{
+ u_int r, best_r = 2, best_v = 2;
+ int best_d = 0x7fffffff;
+
+ for (r = 2; r <= 32; r++) {
+ u_int rr, v, p;
+ int d;
+
+ rr = 41667 * r;
+
+ v = (rr + pixclk / 2) / pixclk;
+
+ if (v > 32 || v < 2)
+ continue;
+
+ p = (rr + v / 2) / v;
+
+ d = pixclk - p;
+
+ if (d < 0)
+ d = -d;
+
+ if (d < best_d) {
+ best_d = d;
+ best_v = v - 1;
+ best_r = r - 1;
+ }
+
+ if (d == 0)
+ break;
+ }
+
+ return best_v << 8 | best_r;
+}
+
+static inline void
+acornfb_vidc20_find_rates(struct vidc_timing *vidc,
+ struct fb_var_screeninfo *var)
+{
+ u_int div;
+
+ /* Select pixel-clock divisor to keep PLL in range */
+ div = var->pixclock / 9090; /*9921*/
+
+ /* Limit divisor */
+ if (div == 0)
+ div = 1;
+ if (div > 8)
+ div = 8;
+
+ /* Encode divisor to VIDC20 setting */
+ switch (div) {
+ case 1: vidc->control |= VIDC20_CTRL_PIX_CK; break;
+ case 2: vidc->control |= VIDC20_CTRL_PIX_CK2; break;
+ case 3: vidc->control |= VIDC20_CTRL_PIX_CK3; break;
+ case 4: vidc->control |= VIDC20_CTRL_PIX_CK4; break;
+ case 5: vidc->control |= VIDC20_CTRL_PIX_CK5; break;
+ case 6: vidc->control |= VIDC20_CTRL_PIX_CK6; break;
+ case 7: vidc->control |= VIDC20_CTRL_PIX_CK7; break;
+ case 8: vidc->control |= VIDC20_CTRL_PIX_CK8; break;
+ }
+
+ /*
+ * With VRAM, the FIFO can be set to the highest possible setting
+ * because there are no latency considerations for other memory
+ * accesses. However, in 64 bit bus mode the FIFO preload value
+ * must not be set to VIDC20_CTRL_FIFO_28 because this will let
+ * the FIFO overflow. See VIDC20 manual page 33 (6.0 Setting the
+ * FIFO preload value).
+ */
+ if (current_par.using_vram) {
+ if (current_par.vram_half_sam == 2048)
+ vidc->control |= VIDC20_CTRL_FIFO_24;
+ else
+ vidc->control |= VIDC20_CTRL_FIFO_28;
+ } else {
+ unsigned long bandwidth = acornfb_bandwidth(var);
+
+ /* Encode bandwidth as VIDC20 setting */
+ if (bandwidth > 33334) /* < 30.0MB/s */
+ vidc->control |= VIDC20_CTRL_FIFO_16;
+ else if (bandwidth > 26666) /* < 37.5MB/s */
+ vidc->control |= VIDC20_CTRL_FIFO_20;
+ else if (bandwidth > 22222) /* < 45.0MB/s */
+ vidc->control |= VIDC20_CTRL_FIFO_24;
+ else /* > 45.0MB/s */
+ vidc->control |= VIDC20_CTRL_FIFO_28;
+ }
+
+ /* Find the PLL values */
+ vidc->pll_ctl = acornfb_vidc20_find_pll(var->pixclock / div);
+}
+
+#define acornfb_default_control() (VIDC20_CTRL_PIX_VCLK)
+#define acornfb_default_econtrol() (VIDC20_ECTL_DAC | VIDC20_ECTL_REG(3))
diff --git a/arch/arm/mach-rpc/include/mach/hardware.h b/arch/arm/mach-rpc/include/mach/hardware.h
new file mode 100644
index 0000000000..6f197706f9
--- /dev/null
+++ b/arch/arm/mach-rpc/include/mach/hardware.h
@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/mach-rpc/include/mach/hardware.h
+ *
+ * Copyright (C) 1996-1999 Russell King.
+ *
+ * This file contains the hardware definitions of the RiscPC series machines.
+ */
+#ifndef __ASM_ARCH_HARDWARE_H
+#define __ASM_ARCH_HARDWARE_H
+
+#include <mach/memory.h>
+
+/*
+ * What hardware must be present
+ */
+#define HAS_IOMD
+#define HAS_VIDC20
+
+/* Hardware addresses of major areas.
+ * *_START is the physical address
+ * *_SIZE is the size of the region
+ * *_BASE is the virtual address
+ */
+#define RPC_RAM_SIZE 0x10000000
+#define RPC_RAM_START 0x10000000
+
+#define EASI_SIZE 0x08000000 /* EASI I/O */
+#define EASI_START 0x08000000
+#define EASI_BASE IOMEM(0xe5000000)
+
+#define IO_START 0x03000000 /* I/O */
+#define IO_SIZE 0x01000000
+#define IO_BASE IOMEM(0xe0000000)
+
+#define SCREEN_START 0x02000000 /* VRAM */
+#define SCREEN_END 0xdfc00000
+#define SCREEN_BASE 0xdf800000
+
+#define UNCACHEABLE_ADDR (FLUSH_BASE + 0x10000)
+
+/*
+ * IO Addresses
+ */
+#define ECARD_EASI_BASE (EASI_BASE)
+#define VIDC_BASE (IO_BASE + 0x00400000)
+#define EXPMASK_BASE (IO_BASE + 0x00360000)
+#define ECARD_IOC4_BASE (IO_BASE + 0x00270000)
+#define ECARD_IOC_BASE (IO_BASE + 0x00240000)
+#define IOMD_BASE (IO_BASE + 0x00200000)
+#define IOC_BASE (IO_BASE + 0x00200000)
+#define ECARD_MEMC8_BASE (IO_BASE + 0x0002b000)
+#define FLOPPYDMA_BASE (IO_BASE + 0x0002a000)
+#define PCIO_BASE (IO_BASE + 0x00010000)
+#define ECARD_MEMC_BASE (IO_BASE + 0x00000000)
+
+#define vidc_writel(val) __raw_writel(val, VIDC_BASE)
+
+#define NETSLOT_BASE 0x0302b000
+#define NETSLOT_SIZE 0x00001000
+
+#define PODSLOT_IOC0_BASE 0x03240000
+#define PODSLOT_IOC4_BASE 0x03270000
+#define PODSLOT_IOC_SIZE (1 << 14)
+#define PODSLOT_MEMC_BASE 0x03000000
+#define PODSLOT_MEMC_SIZE (1 << 14)
+#define PODSLOT_EASI_BASE 0x08000000
+#define PODSLOT_EASI_SIZE (1 << 24)
+
+#define EXPMASK_STATUS (EXPMASK_BASE + 0x00)
+#define EXPMASK_ENABLE (EXPMASK_BASE + 0x04)
+
+#endif
diff --git a/arch/arm/mach-rpc/include/mach/io.h b/arch/arm/mach-rpc/include/mach/io.h
new file mode 100644
index 0000000000..8a8f284066
--- /dev/null
+++ b/arch/arm/mach-rpc/include/mach/io.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/mach-rpc/include/mach/io.h
+ *
+ * Copyright (C) 1997 Russell King
+ *
+ * Modifications:
+ * 06-Dec-1997 RMK Created.
+ */
+#ifndef __ASM_ARM_ARCH_IO_H
+#define __ASM_ARM_ARCH_IO_H
+
+#include <mach/hardware.h>
+
+#define IO_SPACE_LIMIT 0xffff
+
+/*
+ * We need PC style IO addressing for:
+ * - floppy (at 0x3f2,0x3f4,0x3f5,0x3f7)
+ * - parport (at 0x278-0x27a, 0x27b-0x27f, 0x778-0x77a)
+ * - 8250 serial (only for compile)
+ *
+ * These peripherals are found in an area of MMIO which looks very much
+ * like an ISA bus, but with registers at the low byte of each word.
+ */
+#define __io(a) (PCIO_BASE + ((a) << 2))
+
+#endif
diff --git a/arch/arm/mach-rpc/include/mach/irqs.h b/arch/arm/mach-rpc/include/mach/irqs.h
new file mode 100644
index 0000000000..0c3428fd97
--- /dev/null
+++ b/arch/arm/mach-rpc/include/mach/irqs.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/mach-rpc/include/mach/irqs.h
+ *
+ * Copyright (C) 1996 Russell King
+ */
+
+#define IRQ_PRINTER 0
+#define IRQ_BATLOW 1
+#define IRQ_FLOPPYINDEX 2
+#define IRQ_VSYNCPULSE 3
+#define IRQ_POWERON 4
+#define IRQ_TIMER0 5
+#define IRQ_TIMER1 6
+#define IRQ_IMMEDIATE 7
+#define IRQ_EXPCARDFIQ 8
+#define IRQ_HARDDISK 9
+#define IRQ_SERIALPORT 10
+#define IRQ_FLOPPYDISK 12
+#define IRQ_EXPANSIONCARD 13
+#define IRQ_KEYBOARDTX 14
+#define IRQ_KEYBOARDRX 15
+
+#define IRQ_DMA0 16
+#define IRQ_DMA1 17
+#define IRQ_DMA2 18
+#define IRQ_DMA3 19
+#define IRQ_DMAS0 20
+#define IRQ_DMAS1 21
+
+#define FIQ_FLOPPYDATA 0
+#define FIQ_ECONET 2
+#define FIQ_SERIALPORT 4
+#define FIQ_EXPANSIONCARD 6
+#define FIQ_FORCE 7
+
+/*
+ * This is the offset of the FIQ "IRQ" numbers
+ */
+#define FIQ_START 64
+
+#define NR_IRQS 128
diff --git a/arch/arm/mach-rpc/include/mach/isa-dma.h b/arch/arm/mach-rpc/include/mach/isa-dma.h
new file mode 100644
index 0000000000..d9c3af1ef7
--- /dev/null
+++ b/arch/arm/mach-rpc/include/mach/isa-dma.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/mach-rpc/include/mach/isa-dma.h
+ *
+ * Copyright (C) 1997 Russell King
+ */
+#ifndef __ASM_ARCH_DMA_H
+#define __ASM_ARCH_DMA_H
+
+#define MAX_DMA_CHANNELS 8
+
+#define DMA_0 0
+#define DMA_1 1
+#define DMA_2 2
+#define DMA_3 3
+#define DMA_S0 4
+#define DMA_S1 5
+#define DMA_VIRTUAL_FLOPPY 6
+#define DMA_VIRTUAL_SOUND 7
+
+#define DMA_FLOPPY DMA_VIRTUAL_FLOPPY
+
+#define IOMD_DMA_BOUNDARY (PAGE_SIZE - 1)
+
+#endif /* _ASM_ARCH_DMA_H */
+
diff --git a/arch/arm/mach-rpc/include/mach/memory.h b/arch/arm/mach-rpc/include/mach/memory.h
new file mode 100644
index 0000000000..a586eb31b1
--- /dev/null
+++ b/arch/arm/mach-rpc/include/mach/memory.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/mach-rpc/include/mach/memory.h
+ *
+ * Copyright (C) 1996,1997,1998 Russell King.
+ *
+ * Changelog:
+ * 20-Oct-1996 RMK Created
+ * 31-Dec-1997 RMK Fixed definitions to reduce warnings
+ * 11-Jan-1998 RMK Uninlined to reduce hits on cache
+ * 08-Feb-1998 RMK Added __virt_to_bus and __bus_to_virt
+ * 21-Mar-1999 RMK Renamed to memory.h
+ * RMK Added TASK_SIZE and PAGE_OFFSET
+ */
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+/*
+ * Cache flushing area - ROM
+ */
+#define FLUSH_BASE_PHYS 0x00000000
+#define FLUSH_BASE 0xdf000000
+
+/*
+ * Sparsemem support. Each section is a maximum of 64MB. The sections
+ * are offset by 128MB and can cover 128MB, so that gives us a maximum
+ * of 29 physmem bits.
+ */
+#define MAX_PHYSMEM_BITS 29
+#define SECTION_SIZE_BITS 26
+
+#endif
diff --git a/arch/arm/mach-rpc/include/mach/uncompress.h b/arch/arm/mach-rpc/include/mach/uncompress.h
new file mode 100644
index 0000000000..1fbe7eb956
--- /dev/null
+++ b/arch/arm/mach-rpc/include/mach/uncompress.h
@@ -0,0 +1,181 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/mach-rpc/include/mach/uncompress.h
+ *
+ * Copyright (C) 1996 Russell King
+ */
+#define VIDMEM ((char *)SCREEN_START)
+
+#include <linux/io.h>
+#include <mach/hardware.h>
+#include <asm/setup.h>
+#include <asm/page.h>
+
+int video_size_row;
+unsigned char bytes_per_char_h;
+extern unsigned long con_charconvtable[256];
+
+struct param_struct {
+ unsigned long page_size;
+ unsigned long nr_pages;
+ unsigned long ramdisk_size;
+ unsigned long mountrootrdonly;
+ unsigned long rootdev;
+ unsigned long video_num_cols;
+ unsigned long video_num_rows;
+ unsigned long video_x;
+ unsigned long video_y;
+ unsigned long memc_control_reg;
+ unsigned char sounddefault;
+ unsigned char adfsdrives;
+ unsigned char bytes_per_char_h;
+ unsigned char bytes_per_char_v;
+ unsigned long unused[256/4-11];
+};
+
+static const unsigned long palette_4[16] = {
+ 0x00000000,
+ 0x000000cc,
+ 0x0000cc00, /* Green */
+ 0x0000cccc, /* Yellow */
+ 0x00cc0000, /* Blue */
+ 0x00cc00cc, /* Magenta */
+ 0x00cccc00, /* Cyan */
+ 0x00cccccc, /* White */
+ 0x00000000,
+ 0x000000ff,
+ 0x0000ff00,
+ 0x0000ffff,
+ 0x00ff0000,
+ 0x00ff00ff,
+ 0x00ffff00,
+ 0x00ffffff
+};
+
+#define palette_setpixel(p) *(unsigned long *)(IO_START+0x00400000) = 0x10000000|((p) & 255)
+#define palette_write(v) *(unsigned long *)(IO_START+0x00400000) = 0x00000000|((v) & 0x00ffffff)
+
+/*
+ * params_phys is a linker defined symbol - see
+ * arch/arm/boot/compressed/Makefile
+ */
+extern __attribute__((pure)) struct param_struct *params(void);
+#define params (params())
+
+#ifndef STANDALONE_DEBUG
+unsigned long video_num_cols;
+unsigned long video_num_rows;
+unsigned long video_x;
+unsigned long video_y;
+unsigned char bytes_per_char_v;
+int white;
+
+/*
+ * This does not append a newline
+ */
+static inline void putc(int c)
+{
+ extern void ll_write_char(char *, char c, char white);
+ int x,y;
+ char *ptr;
+
+ x = video_x;
+ y = video_y;
+
+ if (c == '\n') {
+ if (++y >= video_num_rows)
+ y--;
+ } else if (c == '\r') {
+ x = 0;
+ } else {
+ ptr = VIDMEM + ((y*video_num_cols*bytes_per_char_v+x)*bytes_per_char_h);
+ ll_write_char(ptr, c, white);
+ if (++x >= video_num_cols) {
+ x = 0;
+ if ( ++y >= video_num_rows ) {
+ y--;
+ }
+ }
+ }
+
+ video_x = x;
+ video_y = y;
+}
+
+static inline void flush(void)
+{
+}
+
+/*
+ * Setup for decompression
+ */
+static void arch_decomp_setup(void)
+{
+ int i;
+ struct tag *t = (struct tag *)params;
+ unsigned int nr_pages = 0, page_size = PAGE_SIZE;
+
+ if (t->hdr.tag == ATAG_CORE) {
+ for (; t->hdr.size; t = tag_next(t)) {
+ if (t->hdr.tag == ATAG_VIDEOTEXT) {
+ video_num_rows = t->u.videotext.video_lines;
+ video_num_cols = t->u.videotext.video_cols;
+ video_x = t->u.videotext.x;
+ video_y = t->u.videotext.y;
+ } else if (t->hdr.tag == ATAG_VIDEOLFB) {
+ bytes_per_char_h = t->u.videolfb.lfb_depth;
+ bytes_per_char_v = 8;
+ } else if (t->hdr.tag == ATAG_MEM) {
+ page_size = PAGE_SIZE;
+ nr_pages += (t->u.mem.size / PAGE_SIZE);
+ }
+ }
+ } else {
+ nr_pages = params->nr_pages;
+ page_size = params->page_size;
+ video_num_rows = params->video_num_rows;
+ video_num_cols = params->video_num_cols;
+ video_x = params->video_x;
+ video_y = params->video_y;
+ bytes_per_char_h = params->bytes_per_char_h;
+ bytes_per_char_v = params->bytes_per_char_v;
+ }
+
+ video_size_row = video_num_cols * bytes_per_char_h;
+
+ if (bytes_per_char_h == 4)
+ for (i = 0; i < 256; i++)
+ con_charconvtable[i] =
+ (i & 128 ? 1 << 0 : 0) |
+ (i & 64 ? 1 << 4 : 0) |
+ (i & 32 ? 1 << 8 : 0) |
+ (i & 16 ? 1 << 12 : 0) |
+ (i & 8 ? 1 << 16 : 0) |
+ (i & 4 ? 1 << 20 : 0) |
+ (i & 2 ? 1 << 24 : 0) |
+ (i & 1 ? 1 << 28 : 0);
+ else
+ for (i = 0; i < 16; i++)
+ con_charconvtable[i] =
+ (i & 8 ? 1 << 0 : 0) |
+ (i & 4 ? 1 << 8 : 0) |
+ (i & 2 ? 1 << 16 : 0) |
+ (i & 1 ? 1 << 24 : 0);
+
+
+ palette_setpixel(0);
+ if (bytes_per_char_h == 1) {
+ palette_write (0);
+ palette_write (0x00ffffff);
+ for (i = 2; i < 256; i++)
+ palette_write (0);
+ white = 1;
+ } else {
+ for (i = 0; i < 256; i++)
+ palette_write (i < 16 ? palette_4[i] : 0);
+ white = 7;
+ }
+
+ if (nr_pages * page_size < 4096*1024) error("<4M of mem\n");
+}
+#endif