From 11c79740d3c03cb81f84e98cf2e2dbd8d9bb53cd Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Krzysztof=20Ha=C5=82asa?= Date: Sat, 23 May 2009 23:58:30 +0200 Subject: IXP4xx: support for Goramo MultiLink router platform. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Krzysztof Hałasa --- arch/arm/mach-ixp4xx/goramo_mlr.c | 507 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 507 insertions(+) create mode 100644 arch/arm/mach-ixp4xx/goramo_mlr.c (limited to 'arch/arm/mach-ixp4xx/goramo_mlr.c') 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 + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 -- cgit v1.2.3