Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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