From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/arm/mach-sa1100/generic.c | 454 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 454 insertions(+)
 create mode 100644 arch/arm/mach-sa1100/generic.c

(limited to 'arch/arm/mach-sa1100/generic.c')

diff --git a/arch/arm/mach-sa1100/generic.c b/arch/arm/mach-sa1100/generic.c
new file mode 100644
index 00000000..9db3e98e
--- /dev/null
+++ b/arch/arm/mach-sa1100/generic.c
@@ -0,0 +1,454 @@
+/*
+ * linux/arch/arm/mach-sa1100/generic.c
+ *
+ * Author: Nicolas Pitre
+ *
+ * Code common to all SA11x0 machines.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/pm.h>
+#include <linux/cpufreq.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+
+#include <video/sa1100fb.h>
+
+#include <asm/div64.h>
+#include <asm/mach/map.h>
+#include <asm/mach/flash.h>
+#include <asm/irq.h>
+#include <asm/system_misc.h>
+
+#include <mach/hardware.h>
+#include <mach/irqs.h>
+
+#include "generic.h"
+
+unsigned int reset_status;
+EXPORT_SYMBOL(reset_status);
+
+#define NR_FREQS	16
+
+/*
+ * This table is setup for a 3.6864MHz Crystal.
+ */
+static const unsigned short cclk_frequency_100khz[NR_FREQS] = {
+	 590,	/*  59.0 MHz */
+	 737,	/*  73.7 MHz */
+	 885,	/*  88.5 MHz */
+	1032,	/* 103.2 MHz */
+	1180,	/* 118.0 MHz */
+	1327,	/* 132.7 MHz */
+	1475,	/* 147.5 MHz */
+	1622,	/* 162.2 MHz */
+	1769,	/* 176.9 MHz */
+	1917,	/* 191.7 MHz */
+	2064,	/* 206.4 MHz */
+	2212,	/* 221.2 MHz */
+	2359,	/* 235.9 MHz */
+	2507,	/* 250.7 MHz */
+	2654,	/* 265.4 MHz */
+	2802	/* 280.2 MHz */
+};
+
+/* rounds up(!)  */
+unsigned int sa11x0_freq_to_ppcr(unsigned int khz)
+{
+	int i;
+
+	khz /= 100;
+
+	for (i = 0; i < NR_FREQS; i++)
+		if (cclk_frequency_100khz[i] >= khz)
+			break;
+
+	return i;
+}
+
+unsigned int sa11x0_ppcr_to_freq(unsigned int idx)
+{
+	unsigned int freq = 0;
+	if (idx < NR_FREQS)
+		freq = cclk_frequency_100khz[idx] * 100;
+	return freq;
+}
+
+
+/* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on
+ * this platform, anyway.
+ */
+int sa11x0_verify_speed(struct cpufreq_policy *policy)
+{
+	unsigned int tmp;
+	if (policy->cpu)
+		return -EINVAL;
+
+	cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
+
+	/* make sure that at least one frequency is within the policy */
+	tmp = cclk_frequency_100khz[sa11x0_freq_to_ppcr(policy->min)] * 100;
+	if (tmp > policy->max)
+		policy->max = tmp;
+
+	cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
+
+	return 0;
+}
+
+unsigned int sa11x0_getspeed(unsigned int cpu)
+{
+	if (cpu)
+		return 0;
+	return cclk_frequency_100khz[PPCR & 0xf] * 100;
+}
+
+/*
+ * Default power-off for SA1100
+ */
+static void sa1100_power_off(void)
+{
+	mdelay(100);
+	local_irq_disable();
+	/* disable internal oscillator, float CS lines */
+	PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
+	/* enable wake-up on GPIO0 (Assabet...) */
+	PWER = GFER = GRER = 1;
+	/*
+	 * set scratchpad to zero, just in case it is used as a
+	 * restart address by the bootloader.
+	 */
+	PSPR = 0;
+	/* enter sleep mode */
+	PMCR = PMCR_SF;
+}
+
+void sa11x0_restart(char mode, const char *cmd)
+{
+	if (mode == 's') {
+		/* Jump into ROM at address 0 */
+		soft_restart(0);
+	} else {
+		/* Use on-chip reset capability */
+		RSRR = RSRR_SWR;
+	}
+}
+
+static void sa11x0_register_device(struct platform_device *dev, void *data)
+{
+	int err;
+	dev->dev.platform_data = data;
+	err = platform_device_register(dev);
+	if (err)
+		printk(KERN_ERR "Unable to register device %s: %d\n",
+			dev->name, err);
+}
+
+
+static struct resource sa11x0udc_resources[] = {
+	[0] = DEFINE_RES_MEM(__PREG(Ser0UDCCR), SZ_64K),
+	[1] = DEFINE_RES_IRQ(IRQ_Ser0UDC),
+};
+
+static u64 sa11x0udc_dma_mask = 0xffffffffUL;
+
+static struct platform_device sa11x0udc_device = {
+	.name		= "sa11x0-udc",
+	.id		= -1,
+	.dev		= {
+		.dma_mask = &sa11x0udc_dma_mask,
+		.coherent_dma_mask = 0xffffffff,
+	},
+	.num_resources	= ARRAY_SIZE(sa11x0udc_resources),
+	.resource	= sa11x0udc_resources,
+};
+
+static struct resource sa11x0uart1_resources[] = {
+	[0] = DEFINE_RES_MEM(__PREG(Ser1UTCR0), SZ_64K),
+	[1] = DEFINE_RES_IRQ(IRQ_Ser1UART),
+};
+
+static struct platform_device sa11x0uart1_device = {
+	.name		= "sa11x0-uart",
+	.id		= 1,
+	.num_resources	= ARRAY_SIZE(sa11x0uart1_resources),
+	.resource	= sa11x0uart1_resources,
+};
+
+static struct resource sa11x0uart3_resources[] = {
+	[0] = DEFINE_RES_MEM(__PREG(Ser3UTCR0), SZ_64K),
+	[1] = DEFINE_RES_IRQ(IRQ_Ser3UART),
+};
+
+static struct platform_device sa11x0uart3_device = {
+	.name		= "sa11x0-uart",
+	.id		= 3,
+	.num_resources	= ARRAY_SIZE(sa11x0uart3_resources),
+	.resource	= sa11x0uart3_resources,
+};
+
+static struct resource sa11x0mcp_resources[] = {
+	[0] = DEFINE_RES_MEM(__PREG(Ser4MCCR0), SZ_64K),
+	[1] = DEFINE_RES_MEM(__PREG(Ser4MCCR1), 4),
+	[2] = DEFINE_RES_IRQ(IRQ_Ser4MCP),
+};
+
+static u64 sa11x0mcp_dma_mask = 0xffffffffUL;
+
+static struct platform_device sa11x0mcp_device = {
+	.name		= "sa11x0-mcp",
+	.id		= -1,
+	.dev = {
+		.dma_mask = &sa11x0mcp_dma_mask,
+		.coherent_dma_mask = 0xffffffff,
+	},
+	.num_resources	= ARRAY_SIZE(sa11x0mcp_resources),
+	.resource	= sa11x0mcp_resources,
+};
+
+void __init sa11x0_ppc_configure_mcp(void)
+{
+	/* Setup the PPC unit for the MCP */
+	PPDR &= ~PPC_RXD4;
+	PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
+	PSDR |= PPC_RXD4;
+	PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
+	PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
+}
+
+void sa11x0_register_mcp(struct mcp_plat_data *data)
+{
+	sa11x0_register_device(&sa11x0mcp_device, data);
+}
+
+static struct resource sa11x0ssp_resources[] = {
+	[0] = DEFINE_RES_MEM(0x80070000, SZ_64K),
+	[1] = DEFINE_RES_IRQ(IRQ_Ser4SSP),
+};
+
+static u64 sa11x0ssp_dma_mask = 0xffffffffUL;
+
+static struct platform_device sa11x0ssp_device = {
+	.name		= "sa11x0-ssp",
+	.id		= -1,
+	.dev = {
+		.dma_mask = &sa11x0ssp_dma_mask,
+		.coherent_dma_mask = 0xffffffff,
+	},
+	.num_resources	= ARRAY_SIZE(sa11x0ssp_resources),
+	.resource	= sa11x0ssp_resources,
+};
+
+static struct resource sa11x0fb_resources[] = {
+	[0] = DEFINE_RES_MEM(0xb0100000, SZ_64K),
+	[1] = DEFINE_RES_IRQ(IRQ_LCD),
+};
+
+static struct platform_device sa11x0fb_device = {
+	.name		= "sa11x0-fb",
+	.id		= -1,
+	.dev = {
+		.coherent_dma_mask = 0xffffffff,
+	},
+	.num_resources	= ARRAY_SIZE(sa11x0fb_resources),
+	.resource	= sa11x0fb_resources,
+};
+
+void sa11x0_register_lcd(struct sa1100fb_mach_info *inf)
+{
+	sa11x0_register_device(&sa11x0fb_device, inf);
+}
+
+static struct platform_device sa11x0pcmcia_device = {
+	.name		= "sa11x0-pcmcia",
+	.id		= -1,
+};
+
+static struct platform_device sa11x0mtd_device = {
+	.name		= "sa1100-mtd",
+	.id		= -1,
+};
+
+void sa11x0_register_mtd(struct flash_platform_data *flash,
+			 struct resource *res, int nr)
+{
+	flash->name = "sa1100";
+	sa11x0mtd_device.resource = res;
+	sa11x0mtd_device.num_resources = nr;
+	sa11x0_register_device(&sa11x0mtd_device, flash);
+}
+
+static struct resource sa11x0ir_resources[] = {
+	DEFINE_RES_MEM(__PREG(Ser2UTCR0), 0x24),
+	DEFINE_RES_MEM(__PREG(Ser2HSCR0), 0x1c),
+	DEFINE_RES_MEM(__PREG(Ser2HSCR2), 0x04),
+	DEFINE_RES_IRQ(IRQ_Ser2ICP),
+};
+
+static struct platform_device sa11x0ir_device = {
+	.name		= "sa11x0-ir",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(sa11x0ir_resources),
+	.resource	= sa11x0ir_resources,
+};
+
+void sa11x0_register_irda(struct irda_platform_data *irda)
+{
+	sa11x0_register_device(&sa11x0ir_device, irda);
+}
+
+static struct resource sa1100_rtc_resources[] = {
+	DEFINE_RES_MEM(0x90010000, 0x40),
+	DEFINE_RES_IRQ_NAMED(IRQ_RTC1Hz, "rtc 1Hz"),
+	DEFINE_RES_IRQ_NAMED(IRQ_RTCAlrm, "rtc alarm"),
+};
+
+static struct platform_device sa11x0rtc_device = {
+	.name		= "sa1100-rtc",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(sa1100_rtc_resources),
+	.resource	= sa1100_rtc_resources,
+};
+
+static struct resource sa11x0dma_resources[] = {
+	DEFINE_RES_MEM(DMA_PHYS, DMA_SIZE),
+	DEFINE_RES_IRQ(IRQ_DMA0),
+	DEFINE_RES_IRQ(IRQ_DMA1),
+	DEFINE_RES_IRQ(IRQ_DMA2),
+	DEFINE_RES_IRQ(IRQ_DMA3),
+	DEFINE_RES_IRQ(IRQ_DMA4),
+	DEFINE_RES_IRQ(IRQ_DMA5),
+};
+
+static u64 sa11x0dma_dma_mask = DMA_BIT_MASK(32);
+
+static struct platform_device sa11x0dma_device = {
+	.name		= "sa11x0-dma",
+	.id		= -1,
+	.dev = {
+		.dma_mask = &sa11x0dma_dma_mask,
+		.coherent_dma_mask = 0xffffffff,
+	},
+	.num_resources	= ARRAY_SIZE(sa11x0dma_resources),
+	.resource	= sa11x0dma_resources,
+};
+
+static struct platform_device *sa11x0_devices[] __initdata = {
+	&sa11x0udc_device,
+	&sa11x0uart1_device,
+	&sa11x0uart3_device,
+	&sa11x0ssp_device,
+	&sa11x0pcmcia_device,
+	&sa11x0rtc_device,
+	&sa11x0dma_device,
+};
+
+static int __init sa1100_init(void)
+{
+	pm_power_off = sa1100_power_off;
+	return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));
+}
+
+arch_initcall(sa1100_init);
+
+void __init sa11x0_init_late(void)
+{
+	sa11x0_pm_init();
+}
+
+/*
+ * Common I/O mapping:
+ *
+ * Typically, static virtual address mappings are as follow:
+ *
+ * 0xf0000000-0xf3ffffff:	miscellaneous stuff (CPLDs, etc.)
+ * 0xf4000000-0xf4ffffff:	SA-1111
+ * 0xf5000000-0xf5ffffff:	reserved (used by cache flushing area)
+ * 0xf6000000-0xfffeffff:	reserved (internal SA1100 IO defined above)
+ * 0xffff0000-0xffff0fff:	SA1100 exception vectors
+ * 0xffff2000-0xffff2fff:	Minicache copy_user_page area
+ *
+ * Below 0xe8000000 is reserved for vm allocation.
+ *
+ * The machine specific code must provide the extra mapping beside the
+ * default mapping provided here.
+ */
+
+static struct map_desc standard_io_desc[] __initdata = {
+	{	/* PCM */
+		.virtual	=  0xf8000000,
+		.pfn		= __phys_to_pfn(0x80000000),
+		.length		= 0x00100000,
+		.type		= MT_DEVICE
+	}, {	/* SCM */
+		.virtual	=  0xfa000000,
+		.pfn		= __phys_to_pfn(0x90000000),
+		.length		= 0x00100000,
+		.type		= MT_DEVICE
+	}, {	/* MER */
+		.virtual	=  0xfc000000,
+		.pfn		= __phys_to_pfn(0xa0000000),
+		.length		= 0x00100000,
+		.type		= MT_DEVICE
+	}, {	/* LCD + DMA */
+		.virtual	=  0xfe000000,
+		.pfn		= __phys_to_pfn(0xb0000000),
+		.length		= 0x00200000,
+		.type		= MT_DEVICE
+	},
+};
+
+void __init sa1100_map_io(void)
+{
+	iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
+}
+
+/*
+ * Disable the memory bus request/grant signals on the SA1110 to
+ * ensure that we don't receive spurious memory requests.  We set
+ * the MBGNT signal false to ensure the SA1111 doesn't own the
+ * SDRAM bus.
+ */
+void sa1110_mb_disable(void)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	
+	PGSR &= ~GPIO_MBGNT;
+	GPCR = GPIO_MBGNT;
+	GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
+
+	GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
+
+	local_irq_restore(flags);
+}
+
+/*
+ * If the system is going to use the SA-1111 DMA engines, set up
+ * the memory bus request/grant pins.
+ */
+void sa1110_mb_enable(void)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	PGSR &= ~GPIO_MBGNT;
+	GPCR = GPIO_MBGNT;
+	GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
+
+	GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
+	TUCR |= TUCR_MR;
+
+	local_irq_restore(flags);
+}
+
-- 
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