CRIS v32: Add new machine dependent files for Etrax-FS and Artpec-3.

The two chips are somewhat different, and needs different handling.
Adds handing of the dma, dram initialization, hardware settings, io,
memory arbiter and pinmux

Also moves the dma, dram initialization and io from CRIS v32 common files.

1 files changed, 386 insertions, 0 deletions

diff --git a/arch/cris/arch-v32/mach-a3/pinmux.c b/arch/cris/arch-v32/mach-a3/pinmux.c
new file mode 100644
index 00000000000..0a28c9bedfb
--- /dev/null
+++ b/arch/cris/arch-v32/mach-a3/pinmux.c
@@ -0,0 +1,386 @@
+/*
+ * Allocator for I/O pins. All pins are allocated to GPIO at bootup.
+ * Unassigned pins and GPIO pins can be allocated to a fixed interface
+ * or the I/O processor instead.
+ *
+ * Copyright (c) 2005-2007 Axis Communications AB.
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/spinlock.h>
+#include <hwregs/reg_map.h>
+#include <hwregs/reg_rdwr.h>
+#include <pinmux.h>
+#include <hwregs/pinmux_defs.h>
+#include <hwregs/clkgen_defs.h>
+
+#undef DEBUG
+
+#define PINS 80
+#define PORT_PINS 32
+#define PORTS 3
+
+static char pins[PINS];
+static DEFINE_SPINLOCK(pinmux_lock);
+
+static void crisv32_pinmux_set(int port);
+
+int
+crisv32_pinmux_init(void)
+{
+	static int initialized;
+
+	if (!initialized) {
+		initialized = 1;
+		REG_WR_INT(pinmux, regi_pinmux, rw_hwprot, 0);
+		crisv32_pinmux_alloc(PORT_A, 0, 31, pinmux_gpio);
+		crisv32_pinmux_alloc(PORT_B, 0, 31, pinmux_gpio);
+		crisv32_pinmux_alloc(PORT_C, 0, 15, pinmux_gpio);
+	}
+
+	return 0;
+}
+
+int
+crisv32_pinmux_alloc(int port, int first_pin, int last_pin, enum pin_mode mode)
+{
+	int i;
+	unsigned long flags;
+
+	crisv32_pinmux_init();
+
+	if (port >= PORTS)
+		return -EINVAL;
+
+	spin_lock_irqsave(&pinmux_lock, flags);
+
+	for (i = first_pin; i <= last_pin; i++) {
+		if ((pins[port * PORT_PINS + i] != pinmux_none) &&
+		    (pins[port * PORT_PINS + i] != pinmux_gpio) &&
+		    (pins[port * PORT_PINS + i] != mode)) {
+			spin_unlock_irqrestore(&pinmux_lock, flags);
+#ifdef DEBUG
+			panic("Pinmux alloc failed!\n");
+#endif
+			return -EPERM;
+		}
+	}
+
+	for (i = first_pin; i <= last_pin; i++)
+		pins[port * PORT_PINS + i] = mode;
+
+	crisv32_pinmux_set(port);
+
+	spin_unlock_irqrestore(&pinmux_lock, flags);
+
+	return 0;
+}
+
+int
+crisv32_pinmux_alloc_fixed(enum fixed_function function)
+{
+	int ret = -EINVAL;
+	char saved[sizeof pins];
+	unsigned long flags;
+
+	spin_lock_irqsave(&pinmux_lock, flags);
+
+	/* Save internal data for recovery */
+	memcpy(saved, pins, sizeof pins);
+
+	crisv32_pinmux_init(); /* must be done before we read rw_hwprot */
+
+	reg_pinmux_rw_hwprot hwprot = REG_RD(pinmux, regi_pinmux, rw_hwprot);
+	reg_clkgen_rw_clk_ctrl clk_ctrl = REG_RD(clkgen, regi_clkgen,
+		rw_clk_ctrl);
+
+	switch (function) {
+	case pinmux_eth:
+		clk_ctrl.eth = regk_clkgen_yes;
+		clk_ctrl.dma0_1_eth = regk_clkgen_yes;
+		ret = crisv32_pinmux_alloc(PORT_B, 8, 23, pinmux_fixed);
+		ret |= crisv32_pinmux_alloc(PORT_B, 24, 25, pinmux_fixed);
+		hwprot.eth = hwprot.eth_mdio = regk_pinmux_yes;
+		break;
+	case pinmux_geth:
+		ret = crisv32_pinmux_alloc(PORT_B, 0, 7, pinmux_fixed);
+		hwprot.geth = regk_pinmux_yes;
+		break;
+	case pinmux_tg_cmos:
+		clk_ctrl.ccd_tg_100 = clk_ctrl.ccd_tg_200 = regk_clkgen_yes;
+		ret = crisv32_pinmux_alloc(PORT_B, 27, 29, pinmux_fixed);
+		hwprot.tg_clk = regk_pinmux_yes;
+		break;
+	case pinmux_tg_ccd:
+		clk_ctrl.ccd_tg_100 = clk_ctrl.ccd_tg_200 = regk_clkgen_yes;
+		ret = crisv32_pinmux_alloc(PORT_B, 27, 31, pinmux_fixed);
+		ret |= crisv32_pinmux_alloc(PORT_C, 0, 15, pinmux_fixed);
+		hwprot.tg = hwprot.tg_clk = regk_pinmux_yes;
+		break;
+	case pinmux_vout:
+		clk_ctrl.strdma0_2_video = regk_clkgen_yes;
+		ret = crisv32_pinmux_alloc(PORT_A, 8, 18, pinmux_fixed);
+		hwprot.vout = hwprot.vout_sync = regk_pinmux_yes;
+		break;
+	case pinmux_ser1:
+		clk_ctrl.sser_ser_dma6_7 = regk_clkgen_yes;
+		ret = crisv32_pinmux_alloc(PORT_A, 24, 25, pinmux_fixed);
+		hwprot.ser1 = regk_pinmux_yes;
+		break;
+	case pinmux_ser2:
+		clk_ctrl.sser_ser_dma6_7 = regk_clkgen_yes;
+		ret = crisv32_pinmux_alloc(PORT_A, 26, 27, pinmux_fixed);
+		hwprot.ser2 = regk_pinmux_yes;
+		break;
+	case pinmux_ser3:
+		clk_ctrl.sser_ser_dma6_7 = regk_clkgen_yes;
+		ret = crisv32_pinmux_alloc(PORT_A, 28, 29, pinmux_fixed);
+		hwprot.ser3 = regk_pinmux_yes;
+		break;
+	case pinmux_ser4:
+		clk_ctrl.sser_ser_dma6_7 = regk_clkgen_yes;
+		ret = crisv32_pinmux_alloc(PORT_A, 30, 31, pinmux_fixed);
+		hwprot.ser4 = regk_pinmux_yes;
+		break;
+	case pinmux_sser:
+		clk_ctrl.sser_ser_dma6_7 = regk_clkgen_yes;
+		ret = crisv32_pinmux_alloc(PORT_A, 19, 23, pinmux_fixed);
+		hwprot.sser = regk_pinmux_yes;
+		break;
+	case pinmux_pio:
+		hwprot.pio = regk_pinmux_yes;
+		ret = 0;
+		break;
+	case pinmux_pwm0:
+		ret = crisv32_pinmux_alloc(PORT_A, 30, 30, pinmux_fixed);
+		hwprot.pwm0 = regk_pinmux_yes;
+		break;
+	case pinmux_pwm1:
+		ret = crisv32_pinmux_alloc(PORT_A, 31, 31, pinmux_fixed);
+		hwprot.pwm1 = regk_pinmux_yes;
+		break;
+	case pinmux_pwm2:
+		ret = crisv32_pinmux_alloc(PORT_B, 26, 26, pinmux_fixed);
+		hwprot.pwm2 = regk_pinmux_yes;
+		break;
+	case pinmux_i2c0:
+		ret = crisv32_pinmux_alloc(PORT_A, 0, 1, pinmux_fixed);
+		hwprot.i2c0 = regk_pinmux_yes;
+		break;
+	case pinmux_i2c1:
+		ret = crisv32_pinmux_alloc(PORT_A, 2, 3, pinmux_fixed);
+		hwprot.i2c1 = regk_pinmux_yes;
+		break;
+	case pinmux_i2c1_3wire:
+		ret = crisv32_pinmux_alloc(PORT_A, 2, 3, pinmux_fixed);
+		ret |= crisv32_pinmux_alloc(PORT_A, 7, 7, pinmux_fixed);
+		hwprot.i2c1 = hwprot.i2c1_sen = regk_pinmux_yes;
+		break;
+	case pinmux_i2c1_sda1:
+		ret = crisv32_pinmux_alloc(PORT_A, 2, 4, pinmux_fixed);
+		hwprot.i2c1 = hwprot.i2c1_sda1 = regk_pinmux_yes;
+		break;
+	case pinmux_i2c1_sda2:
+		ret = crisv32_pinmux_alloc(PORT_A, 2, 3, pinmux_fixed);
+		ret |= crisv32_pinmux_alloc(PORT_A, 5, 5, pinmux_fixed);
+		hwprot.i2c1 = hwprot.i2c1_sda2 = regk_pinmux_yes;
+		break;
+	case pinmux_i2c1_sda3:
+		ret = crisv32_pinmux_alloc(PORT_A, 2, 3, pinmux_fixed);
+		ret |= crisv32_pinmux_alloc(PORT_A, 6, 6, pinmux_fixed);
+		hwprot.i2c1 = hwprot.i2c1_sda3 = regk_pinmux_yes;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	if (!ret) {
+		REG_WR(pinmux, regi_pinmux, rw_hwprot, hwprot);
+		REG_WR(clkgen, regi_clkgen, rw_clk_ctrl, clk_ctrl);
+	} else
+		memcpy(pins, saved, sizeof pins);
+
+  spin_unlock_irqrestore(&pinmux_lock, flags);
+
+  return ret;
+}
+
+void
+crisv32_pinmux_set(int port)
+{
+	int i;
+	int gpio_val = 0;
+	int iop_val = 0;
+	int pin = port * PORT_PINS;
+
+	for (i = 0; (i < PORT_PINS) && (pin < PINS); i++, pin++) {
+		if (pins[pin] == pinmux_gpio)
+			gpio_val |= (1 << i);
+		else if (pins[pin] == pinmux_iop)
+			iop_val |= (1 << i);
+	}
+
+	REG_WRITE(int, regi_pinmux + REG_RD_ADDR_pinmux_rw_gio_pa + 4 * port,
+		gpio_val);
+	REG_WRITE(int, regi_pinmux + REG_RD_ADDR_pinmux_rw_iop_pa + 4 * port,
+		iop_val);
+
+#ifdef DEBUG
+       crisv32_pinmux_dump();
+#endif
+}
+
+int
+crisv32_pinmux_dealloc(int port, int first_pin, int last_pin)
+{
+	int i;
+	unsigned long flags;
+
+	crisv32_pinmux_init();
+
+	if (port > PORTS)
+		return -EINVAL;
+
+	spin_lock_irqsave(&pinmux_lock, flags);
+
+	for (i = first_pin; i <= last_pin; i++)
+		pins[port * PORT_PINS + i] = pinmux_none;
+
+	crisv32_pinmux_set(port);
+	spin_unlock_irqrestore(&pinmux_lock, flags);
+
+	return 0;
+}
+
+int
+crisv32_pinmux_dealloc_fixed(enum fixed_function function)
+{
+	int ret = -EINVAL;
+	char saved[sizeof pins];
+	unsigned long flags;
+
+	spin_lock_irqsave(&pinmux_lock, flags);
+
+	/* Save internal data for recovery */
+	memcpy(saved, pins, sizeof pins);
+
+	crisv32_pinmux_init(); /* must be done before we read rw_hwprot */
+
+	reg_pinmux_rw_hwprot hwprot = REG_RD(pinmux, regi_pinmux, rw_hwprot);
+
+	switch (function) {
+	case pinmux_eth:
+		ret = crisv32_pinmux_dealloc(PORT_B, 8, 23);
+		ret |= crisv32_pinmux_dealloc(PORT_B, 24, 25);
+		ret |= crisv32_pinmux_dealloc(PORT_B, 0, 7);
+		hwprot.eth = hwprot.eth_mdio = hwprot.geth = regk_pinmux_no;
+		break;
+	case pinmux_tg_cmos:
+		ret = crisv32_pinmux_dealloc(PORT_B, 27, 29);
+		hwprot.tg_clk = regk_pinmux_no;
+		break;
+	case pinmux_tg_ccd:
+		ret = crisv32_pinmux_dealloc(PORT_B, 27, 31);
+		ret |= crisv32_pinmux_dealloc(PORT_C, 0, 15);
+		hwprot.tg = hwprot.tg_clk = regk_pinmux_no;
+		break;
+	case pinmux_vout:
+		ret = crisv32_pinmux_dealloc(PORT_A, 8, 18);
+		hwprot.vout = hwprot.vout_sync = regk_pinmux_no;
+		break;
+	case pinmux_ser1:
+		ret = crisv32_pinmux_dealloc(PORT_A, 24, 25);
+		hwprot.ser1 = regk_pinmux_no;
+		break;
+	case pinmux_ser2:
+		ret = crisv32_pinmux_dealloc(PORT_A, 26, 27);
+		hwprot.ser2 = regk_pinmux_no;
+		break;
+	case pinmux_ser3:
+		ret = crisv32_pinmux_dealloc(PORT_A, 28, 29);
+		hwprot.ser3 = regk_pinmux_no;
+		break;
+	case pinmux_ser4:
+		ret = crisv32_pinmux_dealloc(PORT_A, 30, 31);
+		hwprot.ser4 = regk_pinmux_no;
+		break;
+	case pinmux_sser:
+		ret = crisv32_pinmux_dealloc(PORT_A, 19, 23);
+		hwprot.sser = regk_pinmux_no;
+		break;
+	case pinmux_pwm0:
+		ret = crisv32_pinmux_dealloc(PORT_A, 30, 30);
+		hwprot.pwm0 = regk_pinmux_no;
+		break;
+	case pinmux_pwm1:
+		ret = crisv32_pinmux_dealloc(PORT_A, 31, 31);
+		hwprot.pwm1 = regk_pinmux_no;
+		break;
+	case pinmux_pwm2:
+		ret = crisv32_pinmux_dealloc(PORT_B, 26, 26);
+		hwprot.pwm2 = regk_pinmux_no;
+		break;
+	case pinmux_i2c0:
+		ret = crisv32_pinmux_dealloc(PORT_A, 0, 1);
+		hwprot.i2c0 = regk_pinmux_no;
+		break;
+	case pinmux_i2c1:
+		ret = crisv32_pinmux_dealloc(PORT_A, 2, 3);
+		hwprot.i2c1 = regk_pinmux_no;
+		break;
+	case pinmux_i2c1_3wire:
+		ret = crisv32_pinmux_dealloc(PORT_A, 2, 3);
+		ret |= crisv32_pinmux_dealloc(PORT_A, 7, 7);
+		hwprot.i2c1 = hwprot.i2c1_sen = regk_pinmux_no;
+		break;
+	case pinmux_i2c1_sda1:
+		ret = crisv32_pinmux_dealloc(PORT_A, 2, 4);
+		hwprot.i2c1_sda1 = regk_pinmux_no;
+		break;
+	case pinmux_i2c1_sda2:
+		ret = crisv32_pinmux_dealloc(PORT_A, 2, 3);
+		ret |= crisv32_pinmux_dealloc(PORT_A, 5, 5);
+		hwprot.i2c1_sda2 = regk_pinmux_no;
+		break;
+	case pinmux_i2c1_sda3:
+		ret = crisv32_pinmux_dealloc(PORT_A, 2, 3);
+		ret |= crisv32_pinmux_dealloc(PORT_A, 6, 6);
+		hwprot.i2c1_sda3 = regk_pinmux_no;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	if (!ret)
+		REG_WR(pinmux, regi_pinmux, rw_hwprot, hwprot);
+	else
+		memcpy(pins, saved, sizeof pins);
+
+  spin_unlock_irqrestore(&pinmux_lock, flags);
+
+  return ret;
+}
+
+void
+crisv32_pinmux_dump(void)
+{
+	int i, j;
+	int pin = 0;
+
+	crisv32_pinmux_init();
+
+	for (i = 0; i < PORTS; i++) {
+		pin++;
+		printk(KERN_DEBUG "Port %c\n", 'A'+i);
+		for (j = 0; (j < PORT_PINS) && (pin < PINS); j++, pin++)
+			printk(KERN_DEBUG
+				"  Pin %d = %d\n", j, pins[i * PORT_PINS + j]);
+	}
+}
+
+__initcall(crisv32_pinmux_init);