IXP4xx: support for Goramo MultiLink router platform.

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>

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 000000000000..a733b8ff3cec
--- /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