MIPS: Add support for Texas Instruments AR7 System-on-a-Chip

This patch adds support for the Texas Instruments AR7 System-on-a-Chip.
It supports the TNETD7100, 7200 and 7300 versions of the SoC.

Signed-off-by: Matteo Croce <matteo@openwrt.org>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Eugene Konev <ejka@openwrt.org>
Signed-off-by: Nicolas Thill <nico@openwrt.org>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 555 insertions, 0 deletions

diff --git a/arch/mips/ar7/platform.c b/arch/mips/ar7/platform.c
new file mode 100644
index 000000000000..542244961780
--- /dev/null
+++ b/arch/mips/ar7/platform.c
@@ -0,0 +1,555 @@
+/*
+ * Copyright (C) 2006,2007 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2006,2007 Eugene Konev <ejka@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/physmap.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/version.h>
+#include <linux/vlynq.h>
+#include <linux/leds.h>
+#include <linux/string.h>
+#include <linux/etherdevice.h>
+
+#include <asm/addrspace.h>
+#include <asm/mach-ar7/ar7.h>
+#include <asm/mach-ar7/gpio.h>
+#include <asm/mach-ar7/prom.h>
+
+struct plat_vlynq_data {
+	struct plat_vlynq_ops ops;
+	int gpio_bit;
+	int reset_bit;
+};
+
+
+static int vlynq_on(struct vlynq_device *dev)
+{
+	int result;
+	struct plat_vlynq_data *pdata = dev->dev.platform_data;
+
+	result = gpio_request(pdata->gpio_bit, "vlynq");
+	if (result)
+		goto out;
+
+	ar7_device_reset(pdata->reset_bit);
+
+	result = ar7_gpio_disable(pdata->gpio_bit);
+	if (result)
+		goto out_enabled;
+
+	result = ar7_gpio_enable(pdata->gpio_bit);
+	if (result)
+		goto out_enabled;
+
+	result = gpio_direction_output(pdata->gpio_bit, 0);
+	if (result)
+		goto out_gpio_enabled;
+
+	msleep(50);
+
+	gpio_set_value(pdata->gpio_bit, 1);
+	msleep(50);
+
+	return 0;
+
+out_gpio_enabled:
+	ar7_gpio_disable(pdata->gpio_bit);
+out_enabled:
+	ar7_device_disable(pdata->reset_bit);
+	gpio_free(pdata->gpio_bit);
+out:
+	return result;
+}
+
+static void vlynq_off(struct vlynq_device *dev)
+{
+	struct plat_vlynq_data *pdata = dev->dev.platform_data;
+	ar7_gpio_disable(pdata->gpio_bit);
+	gpio_free(pdata->gpio_bit);
+	ar7_device_disable(pdata->reset_bit);
+}
+
+static struct resource physmap_flash_resource = {
+	.name = "mem",
+	.flags = IORESOURCE_MEM,
+	.start = 0x10000000,
+	.end = 0x107fffff,
+};
+
+static struct resource cpmac_low_res[] = {
+	{
+		.name = "regs",
+		.flags = IORESOURCE_MEM,
+		.start = AR7_REGS_MAC0,
+		.end = AR7_REGS_MAC0 + 0x7ff,
+	},
+	{
+		.name = "irq",
+		.flags = IORESOURCE_IRQ,
+		.start = 27,
+		.end = 27,
+	},
+};
+
+static struct resource cpmac_high_res[] = {
+	{
+		.name = "regs",
+		.flags = IORESOURCE_MEM,
+		.start = AR7_REGS_MAC1,
+		.end = AR7_REGS_MAC1 + 0x7ff,
+	},
+	{
+		.name = "irq",
+		.flags = IORESOURCE_IRQ,
+		.start = 41,
+		.end = 41,
+	},
+};
+
+static struct resource vlynq_low_res[] = {
+	{
+		.name = "regs",
+		.flags = IORESOURCE_MEM,
+		.start = AR7_REGS_VLYNQ0,
+		.end = AR7_REGS_VLYNQ0 + 0xff,
+	},
+	{
+		.name = "irq",
+		.flags = IORESOURCE_IRQ,
+		.start = 29,
+		.end = 29,
+	},
+	{
+		.name = "mem",
+		.flags = IORESOURCE_MEM,
+		.start = 0x04000000,
+		.end = 0x04ffffff,
+	},
+	{
+		.name = "devirq",
+		.flags = IORESOURCE_IRQ,
+		.start = 80,
+		.end = 111,
+	},
+};
+
+static struct resource vlynq_high_res[] = {
+	{
+		.name = "regs",
+		.flags = IORESOURCE_MEM,
+		.start = AR7_REGS_VLYNQ1,
+		.end = AR7_REGS_VLYNQ1 + 0xff,
+	},
+	{
+		.name = "irq",
+		.flags = IORESOURCE_IRQ,
+		.start = 33,
+		.end = 33,
+	},
+	{
+		.name = "mem",
+		.flags = IORESOURCE_MEM,
+		.start = 0x0c000000,
+		.end = 0x0cffffff,
+	},
+	{
+		.name = "devirq",
+		.flags = IORESOURCE_IRQ,
+		.start = 112,
+		.end = 143,
+	},
+};
+
+static struct resource usb_res[] = {
+	{
+		.name = "regs",
+		.flags = IORESOURCE_MEM,
+		.start = AR7_REGS_USB,
+		.end = AR7_REGS_USB + 0xff,
+	},
+	{
+		.name = "irq",
+		.flags = IORESOURCE_IRQ,
+		.start = 32,
+		.end = 32,
+	},
+	{
+		.name = "mem",
+		.flags = IORESOURCE_MEM,
+		.start = 0x03400000,
+		.end = 0x034001fff,
+	},
+};
+
+static struct physmap_flash_data physmap_flash_data = {
+	.width = 2,
+};
+
+static struct plat_cpmac_data cpmac_low_data = {
+	.reset_bit = 17,
+	.power_bit = 20,
+	.phy_mask = 0x80000000,
+};
+
+static struct plat_cpmac_data cpmac_high_data = {
+	.reset_bit = 21,
+	.power_bit = 22,
+	.phy_mask = 0x7fffffff,
+};
+
+static struct plat_vlynq_data vlynq_low_data = {
+	.ops.on = vlynq_on,
+	.ops.off = vlynq_off,
+	.reset_bit = 20,
+	.gpio_bit = 18,
+};
+
+static struct plat_vlynq_data vlynq_high_data = {
+	.ops.on = vlynq_on,
+	.ops.off = vlynq_off,
+	.reset_bit = 16,
+	.gpio_bit = 19,
+};
+
+static struct platform_device physmap_flash = {
+	.id = 0,
+	.name = "physmap-flash",
+	.dev.platform_data = &physmap_flash_data,
+	.resource = &physmap_flash_resource,
+	.num_resources = 1,
+};
+
+static u64 cpmac_dma_mask = DMA_32BIT_MASK;
+static struct platform_device cpmac_low = {
+	.id = 0,
+	.name = "cpmac",
+	.dev = {
+		.dma_mask = &cpmac_dma_mask,
+		.coherent_dma_mask = DMA_32BIT_MASK,
+		.platform_data = &cpmac_low_data,
+	},
+	.resource = cpmac_low_res,
+	.num_resources = ARRAY_SIZE(cpmac_low_res),
+};
+
+static struct platform_device cpmac_high = {
+	.id = 1,
+	.name = "cpmac",
+	.dev = {
+		.dma_mask = &cpmac_dma_mask,
+		.coherent_dma_mask = DMA_32BIT_MASK,
+		.platform_data = &cpmac_high_data,
+	},
+	.resource = cpmac_high_res,
+	.num_resources = ARRAY_SIZE(cpmac_high_res),
+};
+
+static struct platform_device vlynq_low = {
+	.id = 0,
+	.name = "vlynq",
+	.dev.platform_data = &vlynq_low_data,
+	.resource = vlynq_low_res,
+	.num_resources = ARRAY_SIZE(vlynq_low_res),
+};
+
+static struct platform_device vlynq_high = {
+	.id = 1,
+	.name = "vlynq",
+	.dev.platform_data = &vlynq_high_data,
+	.resource = vlynq_high_res,
+	.num_resources = ARRAY_SIZE(vlynq_high_res),
+};
+
+
+static struct gpio_led default_leds[] = {
+	{
+		.name = "status",
+		.gpio = 8,
+		.active_low = 1,
+	},
+};
+
+static struct gpio_led dsl502t_leds[] = {
+	{
+		.name = "status",
+		.gpio = 9,
+		.active_low = 1,
+	},
+	{
+		.name = "ethernet",
+		.gpio = 7,
+		.active_low = 1,
+	},
+	{
+		.name = "usb",
+		.gpio = 12,
+		.active_low = 1,
+	},
+};
+
+static struct gpio_led dg834g_leds[] = {
+	{
+		.name = "ppp",
+		.gpio = 6,
+		.active_low = 1,
+	},
+	{
+		.name = "status",
+		.gpio = 7,
+		.active_low = 1,
+	},
+	{
+		.name = "adsl",
+		.gpio = 8,
+		.active_low = 1,
+	},
+	{
+		.name = "wifi",
+		.gpio = 12,
+		.active_low = 1,
+	},
+	{
+		.name = "power",
+		.gpio = 14,
+		.active_low = 1,
+		.default_trigger = "default-on",
+	},
+};
+
+static struct gpio_led fb_sl_leds[] = {
+	{
+		.name = "1",
+		.gpio = 7,
+	},
+	{
+		.name = "2",
+		.gpio = 13,
+		.active_low = 1,
+	},
+	{
+		.name = "3",
+		.gpio = 10,
+		.active_low = 1,
+	},
+	{
+		.name = "4",
+		.gpio = 12,
+		.active_low = 1,
+	},
+	{
+		.name = "5",
+		.gpio = 9,
+		.active_low = 1,
+	},
+};
+
+static struct gpio_led fb_fon_leds[] = {
+	{
+		.name = "1",
+		.gpio = 8,
+	},
+	{
+		.name = "2",
+		.gpio = 3,
+		.active_low = 1,
+	},
+	{
+		.name = "3",
+		.gpio = 5,
+	},
+	{
+		.name = "4",
+		.gpio = 4,
+		.active_low = 1,
+	},
+	{
+		.name = "5",
+		.gpio = 11,
+		.active_low = 1,
+	},
+};
+
+static struct gpio_led_platform_data ar7_led_data;
+
+static struct platform_device ar7_gpio_leds = {
+	.name = "leds-gpio",
+	.id = -1,
+	.dev = {
+		.platform_data = &ar7_led_data,
+	}
+};
+
+static struct platform_device ar7_udc = {
+	.id = -1,
+	.name = "ar7_udc",
+	.resource = usb_res,
+	.num_resources = ARRAY_SIZE(usb_res),
+};
+
+static inline unsigned char char2hex(char h)
+{
+	switch (h) {
+	case '0': case '1': case '2': case '3': case '4':
+	case '5': case '6': case '7': case '8': case '9':
+		return h - '0';
+	case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+		return h - 'A' + 10;
+	case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
+		return h - 'a' + 10;
+	default:
+		return 0;
+	}
+}
+
+static void cpmac_get_mac(int instance, unsigned char *dev_addr)
+{
+	int i;
+	char name[5], default_mac[ETH_ALEN], *mac;
+
+	mac = NULL;
+	sprintf(name, "mac%c", 'a' + instance);
+	mac = prom_getenv(name);
+	if (!mac) {
+		sprintf(name, "mac%c", 'a');
+		mac = prom_getenv(name);
+	}
+	if (!mac) {
+		random_ether_addr(default_mac);
+		mac = default_mac;
+	}
+	for (i = 0; i < 6; i++)
+		dev_addr[i] = (char2hex(mac[i * 3]) << 4) +
+			char2hex(mac[i * 3 + 1]);
+}
+
+static void __init detect_leds(void)
+{
+	char *prid, *usb_prod;
+
+	/* Default LEDs	*/
+	ar7_led_data.num_leds = ARRAY_SIZE(default_leds);
+	ar7_led_data.leds = default_leds;
+
+	/* FIXME: the whole thing is unreliable */
+	prid = prom_getenv("ProductID");
+	usb_prod = prom_getenv("usb_prod");
+
+	/* If we can't get the product id from PROM, use the default LEDs */
+	if (!prid)
+		return;
+
+	if (strstr(prid, "Fritz_Box_FON")) {
+		ar7_led_data.num_leds = ARRAY_SIZE(fb_fon_leds);
+		ar7_led_data.leds = fb_fon_leds;
+	} else if (strstr(prid, "Fritz_Box_")) {
+		ar7_led_data.num_leds = ARRAY_SIZE(fb_sl_leds);
+		ar7_led_data.leds = fb_sl_leds;
+	} else if ((!strcmp(prid, "AR7RD") || !strcmp(prid, "AR7DB"))
+		&& usb_prod != NULL && strstr(usb_prod, "DSL-502T")) {
+		ar7_led_data.num_leds = ARRAY_SIZE(dsl502t_leds);
+		ar7_led_data.leds = dsl502t_leds;
+	} else if (strstr(prid, "DG834")) {
+		ar7_led_data.num_leds = ARRAY_SIZE(dg834g_leds);
+		ar7_led_data.leds = dg834g_leds;
+	}
+}
+
+static int __init ar7_register_devices(void)
+{
+	int res;
+	static struct uart_port uart_port[2];
+
+	memset(uart_port, 0, sizeof(struct uart_port) * 2);
+
+	uart_port[0].type = PORT_16550A;
+	uart_port[0].line = 0;
+	uart_port[0].irq = AR7_IRQ_UART0;
+	uart_port[0].uartclk = ar7_bus_freq() / 2;
+	uart_port[0].iotype = UPIO_MEM32;
+	uart_port[0].mapbase = AR7_REGS_UART0;
+	uart_port[0].membase = ioremap(uart_port[0].mapbase, 256);
+	uart_port[0].regshift = 2;
+	res = early_serial_setup(&uart_port[0]);
+	if (res)
+		return res;
+
+
+	/* Only TNETD73xx have a second serial port */
+	if (ar7_has_second_uart()) {
+		uart_port[1].type = PORT_16550A;
+		uart_port[1].line = 1;
+		uart_port[1].irq = AR7_IRQ_UART1;
+		uart_port[1].uartclk = ar7_bus_freq() / 2;
+		uart_port[1].iotype = UPIO_MEM32;
+		uart_port[1].mapbase = UR8_REGS_UART1;
+		uart_port[1].membase = ioremap(uart_port[1].mapbase, 256);
+		uart_port[1].regshift = 2;
+		res = early_serial_setup(&uart_port[1]);
+		if (res)
+			return res;
+	}
+
+	res = platform_device_register(&physmap_flash);
+	if (res)
+		return res;
+
+	ar7_device_disable(vlynq_low_data.reset_bit);
+	res = platform_device_register(&vlynq_low);
+	if (res)
+		return res;
+
+	if (ar7_has_high_vlynq()) {
+		ar7_device_disable(vlynq_high_data.reset_bit);
+		res = platform_device_register(&vlynq_high);
+		if (res)
+			return res;
+	}
+
+	if (ar7_has_high_cpmac()) {
+		cpmac_get_mac(1, cpmac_high_data.dev_addr);
+		res = platform_device_register(&cpmac_high);
+		if (res)
+			return res;
+	} else {
+		cpmac_low_data.phy_mask = 0xffffffff;
+	}
+
+	cpmac_get_mac(0, cpmac_low_data.dev_addr);
+	res = platform_device_register(&cpmac_low);
+	if (res)
+		return res;
+
+	detect_leds();
+	res = platform_device_register(&ar7_gpio_leds);
+	if (res)
+		return res;
+
+	res = platform_device_register(&ar7_udc);
+
+	return res;
+}
+arch_initcall(ar7_register_devices);