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authorKrzysztof Hałasa <khc@pm.waw.pl>2009-05-23 23:58:30 +0200
committerKrzysztof Hałasa <khc@pm.waw.pl>2009-05-23 23:58:30 +0200
commit11c79740d3c03cb81f84e98cf2e2dbd8d9bb53cd (patch)
tree86687329c03a5dbca0f98b462ab1c5050a4cf1fd /arch/arm/mach-ixp4xx/goramo_mlr.c
parent0771c6939484d2ebe0ec28257c2570aecd9911e0 (diff)
IXP4xx: support for Goramo MultiLink router platform.
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Diffstat (limited to 'arch/arm/mach-ixp4xx/goramo_mlr.c')
-rw-r--r--arch/arm/mach-ixp4xx/goramo_mlr.c507
1 files changed, 507 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/goramo_mlr.c b/arch/arm/mach-ixp4xx/goramo_mlr.c
new file mode 100644
index 00000000000..a733b8ff3ce
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/goramo_mlr.c
@@ -0,0 +1,507 @@
+/*
+ * Goramo MultiLink router platform code
+ * Copyright (C) 2006-2009 Krzysztof Halasa <khc@pm.waw.pl>
+ */
+
+#include <linux/delay.h>
+#include <linux/hdlc.h>
+#include <linux/i2c-gpio.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/serial_8250.h>
+#include <asm/mach-types.h>
+#include <asm/system.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/flash.h>
+#include <asm/mach/pci.h>
+
+#define xgpio_irq(n) (IRQ_IXP4XX_GPIO ## n)
+#define gpio_irq(n) xgpio_irq(n)
+
+#define SLOT_ETHA 0x0B /* IDSEL = AD21 */
+#define SLOT_ETHB 0x0C /* IDSEL = AD20 */
+#define SLOT_MPCI 0x0D /* IDSEL = AD19 */
+#define SLOT_NEC 0x0E /* IDSEL = AD18 */
+
+#define IRQ_ETHA IRQ_IXP4XX_GPIO4
+#define IRQ_ETHB IRQ_IXP4XX_GPIO5
+#define IRQ_NEC IRQ_IXP4XX_GPIO3
+#define IRQ_MPCI IRQ_IXP4XX_GPIO12
+
+/* GPIO lines */
+#define GPIO_SCL 0
+#define GPIO_SDA 1
+#define GPIO_STR 2
+#define GPIO_HSS0_DCD_N 6
+#define GPIO_HSS1_DCD_N 7
+#define GPIO_HSS0_CTS_N 10
+#define GPIO_HSS1_CTS_N 11
+#define GPIO_HSS1_RTS_N 13
+#define GPIO_HSS0_RTS_N 14
+
+/* Control outputs from 74HC4094 */
+#define CONTROL_HSS0_CLK_INT 0
+#define CONTROL_HSS1_CLK_INT 1
+#define CONTROL_HSS0_DTR_N 2
+#define CONTROL_HSS1_DTR_N 3
+#define CONTROL_EXT 4
+#define CONTROL_AUTO_RESET 5
+#define CONTROL_PCI_RESET_N 6
+#define CONTROL_EEPROM_WC_N 7
+
+/* offsets from start of flash ROM = 0x50000000 */
+#define CFG_ETH0_ADDRESS 0x40 /* 6 bytes */
+#define CFG_ETH1_ADDRESS 0x46 /* 6 bytes */
+#define CFG_REV 0x4C /* u32 */
+#define CFG_SDRAM_SIZE 0x50 /* u32 */
+#define CFG_SDRAM_CONF 0x54 /* u32 */
+#define CFG_SDRAM_MODE 0x58 /* u32 */
+#define CFG_SDRAM_REFRESH 0x5C /* u32 */
+
+#define CFG_HW_BITS 0x60 /* u32 */
+#define CFG_HW_USB_PORTS 0x00000007 /* 0 = no NEC chip, 1-5 = ports # */
+#define CFG_HW_HAS_PCI_SLOT 0x00000008
+#define CFG_HW_HAS_ETH0 0x00000010
+#define CFG_HW_HAS_ETH1 0x00000020
+#define CFG_HW_HAS_HSS0 0x00000040
+#define CFG_HW_HAS_HSS1 0x00000080
+#define CFG_HW_HAS_UART0 0x00000100
+#define CFG_HW_HAS_UART1 0x00000200
+#define CFG_HW_HAS_EEPROM 0x00000400
+
+#define FLASH_CMD_READ_ARRAY 0xFF
+#define FLASH_CMD_READ_ID 0x90
+#define FLASH_SER_OFF 0x102 /* 0x81 in 16-bit mode */
+
+static u32 hw_bits = 0xFFFFFFFD; /* assume all hardware present */;
+static u8 control_value;
+
+static void set_scl(u8 value)
+{
+ gpio_line_set(GPIO_SCL, !!value);
+ udelay(3);
+}
+
+static void set_sda(u8 value)
+{
+ gpio_line_set(GPIO_SDA, !!value);
+ udelay(3);
+}
+
+static void set_str(u8 value)
+{
+ gpio_line_set(GPIO_STR, !!value);
+ udelay(3);
+}
+
+static inline void set_control(int line, int value)
+{
+ if (value)
+ control_value |= (1 << line);
+ else
+ control_value &= ~(1 << line);
+}
+
+
+static void output_control(void)
+{
+ int i;
+
+ gpio_line_config(GPIO_SCL, IXP4XX_GPIO_OUT);
+ gpio_line_config(GPIO_SDA, IXP4XX_GPIO_OUT);
+
+ for (i = 0; i < 8; i++) {
+ set_scl(0);
+ set_sda(control_value & (0x80 >> i)); /* MSB first */
+ set_scl(1); /* active edge */
+ }
+
+ set_str(1);
+ set_str(0);
+
+ set_scl(0);
+ set_sda(1); /* Be ready for START */
+ set_scl(1);
+}
+
+
+static void (*set_carrier_cb_tab[2])(void *pdev, int carrier);
+
+static int hss_set_clock(int port, unsigned int clock_type)
+{
+ int ctrl_int = port ? CONTROL_HSS1_CLK_INT : CONTROL_HSS0_CLK_INT;
+
+ switch (clock_type) {
+ case CLOCK_DEFAULT:
+ case CLOCK_EXT:
+ set_control(ctrl_int, 0);
+ output_control();
+ return CLOCK_EXT;
+
+ case CLOCK_INT:
+ set_control(ctrl_int, 1);
+ output_control();
+ return CLOCK_INT;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static irqreturn_t hss_dcd_irq(int irq, void *pdev)
+{
+ int i, port = (irq == gpio_irq(GPIO_HSS1_DCD_N));
+ gpio_line_get(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N, &i);
+ set_carrier_cb_tab[port](pdev, !i);
+ return IRQ_HANDLED;
+}
+
+
+static int hss_open(int port, void *pdev,
+ void (*set_carrier_cb)(void *pdev, int carrier))
+{
+ int i, irq;
+
+ if (!port)
+ irq = gpio_irq(GPIO_HSS0_DCD_N);
+ else
+ irq = gpio_irq(GPIO_HSS1_DCD_N);
+
+ gpio_line_get(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N, &i);
+ set_carrier_cb(pdev, !i);
+
+ set_carrier_cb_tab[!!port] = set_carrier_cb;
+
+ if ((i = request_irq(irq, hss_dcd_irq, 0, "IXP4xx HSS", pdev)) != 0) {
+ printk(KERN_ERR "ixp4xx_hss: failed to request IRQ%i (%i)\n",
+ irq, i);
+ return i;
+ }
+
+ set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 0);
+ output_control();
+ gpio_line_set(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 0);
+ return 0;
+}
+
+static void hss_close(int port, void *pdev)
+{
+ free_irq(port ? gpio_irq(GPIO_HSS1_DCD_N) : gpio_irq(GPIO_HSS0_DCD_N),
+ pdev);
+ set_carrier_cb_tab[!!port] = NULL; /* catch bugs */
+
+ set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 1);
+ output_control();
+ gpio_line_set(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 1);
+}
+
+
+/* Flash memory */
+static struct flash_platform_data flash_data = {
+ .map_name = "cfi_probe",
+ .width = 2,
+};
+
+static struct resource flash_resource = {
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device device_flash = {
+ .name = "IXP4XX-Flash",
+ .id = 0,
+ .dev = { .platform_data = &flash_data },
+ .num_resources = 1,
+ .resource = &flash_resource,
+};
+
+
+/* I^2C interface */
+static struct i2c_gpio_platform_data i2c_data = {
+ .sda_pin = GPIO_SDA,
+ .scl_pin = GPIO_SCL,
+};
+
+static struct platform_device device_i2c = {
+ .name = "i2c-gpio",
+ .id = 0,
+ .dev = { .platform_data = &i2c_data },
+};
+
+
+/* IXP425 2 UART ports */
+static struct resource uart_resources[] = {
+ {
+ .start = IXP4XX_UART1_BASE_PHYS,
+ .end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = IXP4XX_UART2_BASE_PHYS,
+ .end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
+ .flags = IORESOURCE_MEM,
+ }
+};
+
+static struct plat_serial8250_port uart_data[] = {
+ {
+ .mapbase = IXP4XX_UART1_BASE_PHYS,
+ .membase = (char __iomem *)IXP4XX_UART1_BASE_VIRT +
+ REG_OFFSET,
+ .irq = IRQ_IXP4XX_UART1,
+ .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+ .iotype = UPIO_MEM,
+ .regshift = 2,
+ .uartclk = IXP4XX_UART_XTAL,
+ },
+ {
+ .mapbase = IXP4XX_UART2_BASE_PHYS,
+ .membase = (char __iomem *)IXP4XX_UART2_BASE_VIRT +
+ REG_OFFSET,
+ .irq = IRQ_IXP4XX_UART2,
+ .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+ .iotype = UPIO_MEM,
+ .regshift = 2,
+ .uartclk = IXP4XX_UART_XTAL,
+ },
+ { },
+};
+
+static struct platform_device device_uarts = {
+ .name = "serial8250",
+ .id = PLAT8250_DEV_PLATFORM,
+ .dev.platform_data = uart_data,
+ .num_resources = 2,
+ .resource = uart_resources,
+};
+
+
+/* Built-in 10/100 Ethernet MAC interfaces */
+static struct eth_plat_info eth_plat[] = {
+ {
+ .phy = 0,
+ .rxq = 3,
+ .txreadyq = 32,
+ }, {
+ .phy = 1,
+ .rxq = 4,
+ .txreadyq = 33,
+ }
+};
+
+static struct platform_device device_eth_tab[] = {
+ {
+ .name = "ixp4xx_eth",
+ .id = IXP4XX_ETH_NPEB,
+ .dev.platform_data = eth_plat,
+ }, {
+ .name = "ixp4xx_eth",
+ .id = IXP4XX_ETH_NPEC,
+ .dev.platform_data = eth_plat + 1,
+ }
+};
+
+
+/* IXP425 2 synchronous serial ports */
+static struct hss_plat_info hss_plat[] = {
+ {
+ .set_clock = hss_set_clock,
+ .open = hss_open,
+ .close = hss_close,
+ .txreadyq = 34,
+ }, {
+ .set_clock = hss_set_clock,
+ .open = hss_open,
+ .close = hss_close,
+ .txreadyq = 35,
+ }
+};
+
+static struct platform_device device_hss_tab[] = {
+ {
+ .name = "ixp4xx_hss",
+ .id = 0,
+ .dev.platform_data = hss_plat,
+ }, {
+ .name = "ixp4xx_hss",
+ .id = 1,
+ .dev.platform_data = hss_plat + 1,
+ }
+};
+
+
+static struct platform_device *device_tab[6] __initdata = {
+ &device_flash, /* index 0 */
+};
+
+static inline u8 __init flash_readb(u8 __iomem *flash, u32 addr)
+{
+#ifdef __ARMEB__
+ return __raw_readb(flash + addr);
+#else
+ return __raw_readb(flash + (addr ^ 3));
+#endif
+}
+
+static inline u16 __init flash_readw(u8 __iomem *flash, u32 addr)
+{
+#ifdef __ARMEB__
+ return __raw_readw(flash + addr);
+#else
+ return __raw_readw(flash + (addr ^ 2));
+#endif
+}
+
+static void __init gmlr_init(void)
+{
+ u8 __iomem *flash;
+ int i, devices = 1; /* flash */
+
+ ixp4xx_sys_init();
+
+ if ((flash = ioremap(IXP4XX_EXP_BUS_BASE_PHYS, 0x80)) == NULL)
+ printk(KERN_ERR "goramo-mlr: unable to access system"
+ " configuration data\n");
+ else {
+ system_rev = __raw_readl(flash + CFG_REV);
+ hw_bits = __raw_readl(flash + CFG_HW_BITS);
+
+ for (i = 0; i < ETH_ALEN; i++) {
+ eth_plat[0].hwaddr[i] =
+ flash_readb(flash, CFG_ETH0_ADDRESS + i);
+ eth_plat[1].hwaddr[i] =
+ flash_readb(flash, CFG_ETH1_ADDRESS + i);
+ }
+
+ __raw_writew(FLASH_CMD_READ_ID, flash);
+ system_serial_high = flash_readw(flash, FLASH_SER_OFF);
+ system_serial_high <<= 16;
+ system_serial_high |= flash_readw(flash, FLASH_SER_OFF + 2);
+ system_serial_low = flash_readw(flash, FLASH_SER_OFF + 4);
+ system_serial_low <<= 16;
+ system_serial_low |= flash_readw(flash, FLASH_SER_OFF + 6);
+ __raw_writew(FLASH_CMD_READ_ARRAY, flash);
+
+ iounmap(flash);
+ }
+
+ switch (hw_bits & (CFG_HW_HAS_UART0 | CFG_HW_HAS_UART1)) {
+ case CFG_HW_HAS_UART0:
+ memset(&uart_data[1], 0, sizeof(uart_data[1]));
+ device_uarts.num_resources = 1;
+ break;
+
+ case CFG_HW_HAS_UART1:
+ device_uarts.dev.platform_data = &uart_data[1];
+ device_uarts.resource = &uart_resources[1];
+ device_uarts.num_resources = 1;
+ break;
+ }
+ if (hw_bits & (CFG_HW_HAS_UART0 | CFG_HW_HAS_UART1))
+ device_tab[devices++] = &device_uarts; /* max index 1 */
+
+ if (hw_bits & CFG_HW_HAS_ETH0)
+ device_tab[devices++] = &device_eth_tab[0]; /* max index 2 */
+ if (hw_bits & CFG_HW_HAS_ETH1)
+ device_tab[devices++] = &device_eth_tab[1]; /* max index 3 */
+
+ if (hw_bits & CFG_HW_HAS_HSS0)
+ device_tab[devices++] = &device_hss_tab[0]; /* max index 4 */
+ if (hw_bits & CFG_HW_HAS_HSS1)
+ device_tab[devices++] = &device_hss_tab[1]; /* max index 5 */
+
+ if (hw_bits & CFG_HW_HAS_EEPROM)
+ device_tab[devices++] = &device_i2c; /* max index 6 */
+
+ gpio_line_config(GPIO_SCL, IXP4XX_GPIO_OUT);
+ gpio_line_config(GPIO_SDA, IXP4XX_GPIO_OUT);
+ gpio_line_config(GPIO_STR, IXP4XX_GPIO_OUT);
+ gpio_line_config(GPIO_HSS0_RTS_N, IXP4XX_GPIO_OUT);
+ gpio_line_config(GPIO_HSS1_RTS_N, IXP4XX_GPIO_OUT);
+ gpio_line_config(GPIO_HSS0_DCD_N, IXP4XX_GPIO_IN);
+ gpio_line_config(GPIO_HSS1_DCD_N, IXP4XX_GPIO_IN);
+ set_irq_type(gpio_irq(GPIO_HSS0_DCD_N), IRQ_TYPE_EDGE_BOTH);
+ set_irq_type(gpio_irq(GPIO_HSS1_DCD_N), IRQ_TYPE_EDGE_BOTH);
+
+ set_control(CONTROL_HSS0_DTR_N, 1);
+ set_control(CONTROL_HSS1_DTR_N, 1);
+ set_control(CONTROL_EEPROM_WC_N, 1);
+ set_control(CONTROL_PCI_RESET_N, 1);
+ output_control();
+
+ msleep(1); /* Wait for PCI devices to initialize */
+
+ flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
+ flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
+
+ platform_add_devices(device_tab, devices);
+}
+
+
+#ifdef CONFIG_PCI
+static void __init gmlr_pci_preinit(void)
+{
+ set_irq_type(IRQ_ETHA, IRQ_TYPE_LEVEL_LOW);
+ set_irq_type(IRQ_ETHB, IRQ_TYPE_LEVEL_LOW);
+ set_irq_type(IRQ_NEC, IRQ_TYPE_LEVEL_LOW);
+ set_irq_type(IRQ_MPCI, IRQ_TYPE_LEVEL_LOW);
+ ixp4xx_pci_preinit();
+}
+
+static void __init gmlr_pci_postinit(void)
+{
+ if ((hw_bits & CFG_HW_USB_PORTS) >= 2 &&
+ (hw_bits & CFG_HW_USB_PORTS) < 5) {
+ /* need to adjust number of USB ports on NEC chip */
+ u32 value, addr = BIT(32 - SLOT_NEC) | 0xE0;
+ if (!ixp4xx_pci_read(addr, NP_CMD_CONFIGREAD, &value)) {
+ value &= ~7;
+ value |= (hw_bits & CFG_HW_USB_PORTS);
+ ixp4xx_pci_write(addr, NP_CMD_CONFIGWRITE, value);
+ }
+ }
+}
+
+static int __init gmlr_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+ switch(slot) {
+ case SLOT_ETHA: return IRQ_ETHA;
+ case SLOT_ETHB: return IRQ_ETHB;
+ case SLOT_NEC: return IRQ_NEC;
+ default: return IRQ_MPCI;
+ }
+}
+
+static struct hw_pci gmlr_hw_pci __initdata = {
+ .nr_controllers = 1,
+ .preinit = gmlr_pci_preinit,
+ .postinit = gmlr_pci_postinit,
+ .swizzle = pci_std_swizzle,
+ .setup = ixp4xx_setup,
+ .scan = ixp4xx_scan_bus,
+ .map_irq = gmlr_map_irq,
+};
+
+static int __init gmlr_pci_init(void)
+{
+ if (machine_is_goramo_mlr() &&
+ (hw_bits & (CFG_HW_USB_PORTS | CFG_HW_HAS_PCI_SLOT)))
+ pci_common_init(&gmlr_hw_pci);
+ return 0;
+}
+
+subsys_initcall(gmlr_pci_init);
+#endif /* CONFIG_PCI */
+
+
+MACHINE_START(GORAMO_MLR, "MultiLink")
+ /* Maintainer: Krzysztof Halasa */
+ .phys_io = IXP4XX_PERIPHERAL_BASE_PHYS,
+ .io_pg_offst = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
+ .map_io = ixp4xx_map_io,
+ .init_irq = ixp4xx_init_irq,
+ .timer = &ixp4xx_timer,
+ .boot_params = 0x0100,
+ .init_machine = gmlr_init,
+MACHINE_END