507 lines
12 KiB
C
507 lines
12 KiB
C
/*
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* Goramo MultiLink router platform code
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* Copyright (C) 2006-2009 Krzysztof Halasa <khc@pm.waw.pl>
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*/
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#include <linux/delay.h>
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#include <linux/hdlc.h>
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#include <linux/i2c-gpio.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/serial_8250.h>
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#include <asm/mach-types.h>
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#include <asm/system.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/flash.h>
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#include <asm/mach/pci.h>
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#define SLOT_ETHA 0x0B /* IDSEL = AD21 */
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#define SLOT_ETHB 0x0C /* IDSEL = AD20 */
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#define SLOT_MPCI 0x0D /* IDSEL = AD19 */
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#define SLOT_NEC 0x0E /* IDSEL = AD18 */
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/* GPIO lines */
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#define GPIO_SCL 0
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#define GPIO_SDA 1
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#define GPIO_STR 2
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#define GPIO_IRQ_NEC 3
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#define GPIO_IRQ_ETHA 4
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#define GPIO_IRQ_ETHB 5
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#define GPIO_HSS0_DCD_N 6
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#define GPIO_HSS1_DCD_N 7
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#define GPIO_UART0_DCD 8
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#define GPIO_UART1_DCD 9
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#define GPIO_HSS0_CTS_N 10
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#define GPIO_HSS1_CTS_N 11
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#define GPIO_IRQ_MPCI 12
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#define GPIO_HSS1_RTS_N 13
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#define GPIO_HSS0_RTS_N 14
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/* GPIO15 is not connected */
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/* Control outputs from 74HC4094 */
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#define CONTROL_HSS0_CLK_INT 0
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#define CONTROL_HSS1_CLK_INT 1
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#define CONTROL_HSS0_DTR_N 2
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#define CONTROL_HSS1_DTR_N 3
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#define CONTROL_EXT 4
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#define CONTROL_AUTO_RESET 5
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#define CONTROL_PCI_RESET_N 6
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#define CONTROL_EEPROM_WC_N 7
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/* offsets from start of flash ROM = 0x50000000 */
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#define CFG_ETH0_ADDRESS 0x40 /* 6 bytes */
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#define CFG_ETH1_ADDRESS 0x46 /* 6 bytes */
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#define CFG_REV 0x4C /* u32 */
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#define CFG_SDRAM_SIZE 0x50 /* u32 */
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#define CFG_SDRAM_CONF 0x54 /* u32 */
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#define CFG_SDRAM_MODE 0x58 /* u32 */
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#define CFG_SDRAM_REFRESH 0x5C /* u32 */
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#define CFG_HW_BITS 0x60 /* u32 */
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#define CFG_HW_USB_PORTS 0x00000007 /* 0 = no NEC chip, 1-5 = ports # */
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#define CFG_HW_HAS_PCI_SLOT 0x00000008
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#define CFG_HW_HAS_ETH0 0x00000010
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#define CFG_HW_HAS_ETH1 0x00000020
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#define CFG_HW_HAS_HSS0 0x00000040
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#define CFG_HW_HAS_HSS1 0x00000080
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#define CFG_HW_HAS_UART0 0x00000100
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#define CFG_HW_HAS_UART1 0x00000200
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#define CFG_HW_HAS_EEPROM 0x00000400
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#define FLASH_CMD_READ_ARRAY 0xFF
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#define FLASH_CMD_READ_ID 0x90
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#define FLASH_SER_OFF 0x102 /* 0x81 in 16-bit mode */
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static u32 hw_bits = 0xFFFFFFFD; /* assume all hardware present */;
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static u8 control_value;
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static void set_scl(u8 value)
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{
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gpio_line_set(GPIO_SCL, !!value);
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udelay(3);
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}
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static void set_sda(u8 value)
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{
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gpio_line_set(GPIO_SDA, !!value);
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udelay(3);
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}
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static void set_str(u8 value)
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{
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gpio_line_set(GPIO_STR, !!value);
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udelay(3);
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}
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static inline void set_control(int line, int value)
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{
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if (value)
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control_value |= (1 << line);
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else
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control_value &= ~(1 << line);
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}
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static void output_control(void)
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{
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int i;
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gpio_line_config(GPIO_SCL, IXP4XX_GPIO_OUT);
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gpio_line_config(GPIO_SDA, IXP4XX_GPIO_OUT);
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for (i = 0; i < 8; i++) {
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set_scl(0);
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set_sda(control_value & (0x80 >> i)); /* MSB first */
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set_scl(1); /* active edge */
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}
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set_str(1);
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set_str(0);
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set_scl(0);
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set_sda(1); /* Be ready for START */
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set_scl(1);
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}
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static void (*set_carrier_cb_tab[2])(void *pdev, int carrier);
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static int hss_set_clock(int port, unsigned int clock_type)
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{
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int ctrl_int = port ? CONTROL_HSS1_CLK_INT : CONTROL_HSS0_CLK_INT;
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switch (clock_type) {
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case CLOCK_DEFAULT:
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case CLOCK_EXT:
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set_control(ctrl_int, 0);
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output_control();
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return CLOCK_EXT;
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case CLOCK_INT:
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set_control(ctrl_int, 1);
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output_control();
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return CLOCK_INT;
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default:
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return -EINVAL;
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}
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}
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static irqreturn_t hss_dcd_irq(int irq, void *pdev)
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{
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int i, port = (irq == IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N));
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gpio_line_get(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N, &i);
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set_carrier_cb_tab[port](pdev, !i);
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return IRQ_HANDLED;
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}
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static int hss_open(int port, void *pdev,
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void (*set_carrier_cb)(void *pdev, int carrier))
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{
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int i, irq;
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if (!port)
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irq = IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N);
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else
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irq = IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N);
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gpio_line_get(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N, &i);
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set_carrier_cb(pdev, !i);
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set_carrier_cb_tab[!!port] = set_carrier_cb;
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if ((i = request_irq(irq, hss_dcd_irq, 0, "IXP4xx HSS", pdev)) != 0) {
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printk(KERN_ERR "ixp4xx_hss: failed to request IRQ%i (%i)\n",
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irq, i);
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return i;
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}
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set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 0);
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output_control();
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gpio_line_set(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 0);
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return 0;
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}
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static void hss_close(int port, void *pdev)
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{
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free_irq(port ? IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N) :
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IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N), pdev);
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set_carrier_cb_tab[!!port] = NULL; /* catch bugs */
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set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 1);
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output_control();
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gpio_line_set(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 1);
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}
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/* Flash memory */
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static struct flash_platform_data flash_data = {
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.map_name = "cfi_probe",
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.width = 2,
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};
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static struct resource flash_resource = {
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device device_flash = {
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.name = "IXP4XX-Flash",
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.id = 0,
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.dev = { .platform_data = &flash_data },
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.num_resources = 1,
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.resource = &flash_resource,
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};
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/* I^2C interface */
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static struct i2c_gpio_platform_data i2c_data = {
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.sda_pin = GPIO_SDA,
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.scl_pin = GPIO_SCL,
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};
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static struct platform_device device_i2c = {
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.name = "i2c-gpio",
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.id = 0,
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.dev = { .platform_data = &i2c_data },
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};
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/* IXP425 2 UART ports */
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static struct resource uart_resources[] = {
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{
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.start = IXP4XX_UART1_BASE_PHYS,
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.end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = IXP4XX_UART2_BASE_PHYS,
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.end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
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.flags = IORESOURCE_MEM,
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}
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};
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static struct plat_serial8250_port uart_data[] = {
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{
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.mapbase = IXP4XX_UART1_BASE_PHYS,
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.membase = (char __iomem *)IXP4XX_UART1_BASE_VIRT +
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REG_OFFSET,
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.irq = IRQ_IXP4XX_UART1,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
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.iotype = UPIO_MEM,
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.regshift = 2,
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.uartclk = IXP4XX_UART_XTAL,
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},
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{
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.mapbase = IXP4XX_UART2_BASE_PHYS,
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.membase = (char __iomem *)IXP4XX_UART2_BASE_VIRT +
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REG_OFFSET,
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.irq = IRQ_IXP4XX_UART2,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
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.iotype = UPIO_MEM,
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.regshift = 2,
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.uartclk = IXP4XX_UART_XTAL,
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},
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{ },
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};
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static struct platform_device device_uarts = {
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.name = "serial8250",
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.id = PLAT8250_DEV_PLATFORM,
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.dev.platform_data = uart_data,
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.num_resources = 2,
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.resource = uart_resources,
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};
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/* Built-in 10/100 Ethernet MAC interfaces */
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static struct eth_plat_info eth_plat[] = {
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{
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.phy = 0,
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.rxq = 3,
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.txreadyq = 32,
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}, {
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.phy = 1,
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.rxq = 4,
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.txreadyq = 33,
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}
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};
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static struct platform_device device_eth_tab[] = {
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{
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.name = "ixp4xx_eth",
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.id = IXP4XX_ETH_NPEB,
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.dev.platform_data = eth_plat,
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}, {
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.name = "ixp4xx_eth",
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.id = IXP4XX_ETH_NPEC,
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.dev.platform_data = eth_plat + 1,
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}
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};
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/* IXP425 2 synchronous serial ports */
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static struct hss_plat_info hss_plat[] = {
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{
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.set_clock = hss_set_clock,
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.open = hss_open,
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.close = hss_close,
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.txreadyq = 34,
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}, {
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.set_clock = hss_set_clock,
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.open = hss_open,
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.close = hss_close,
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.txreadyq = 35,
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}
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};
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static struct platform_device device_hss_tab[] = {
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{
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.name = "ixp4xx_hss",
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.id = 0,
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.dev.platform_data = hss_plat,
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}, {
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.name = "ixp4xx_hss",
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.id = 1,
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.dev.platform_data = hss_plat + 1,
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}
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};
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static struct platform_device *device_tab[6] __initdata = {
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&device_flash, /* index 0 */
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};
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static inline u8 __init flash_readb(u8 __iomem *flash, u32 addr)
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{
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#ifdef __ARMEB__
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return __raw_readb(flash + addr);
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#else
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return __raw_readb(flash + (addr ^ 3));
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#endif
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}
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static inline u16 __init flash_readw(u8 __iomem *flash, u32 addr)
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{
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#ifdef __ARMEB__
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return __raw_readw(flash + addr);
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#else
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return __raw_readw(flash + (addr ^ 2));
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#endif
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}
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static void __init gmlr_init(void)
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{
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u8 __iomem *flash;
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int i, devices = 1; /* flash */
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ixp4xx_sys_init();
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if ((flash = ioremap(IXP4XX_EXP_BUS_BASE_PHYS, 0x80)) == NULL)
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printk(KERN_ERR "goramo-mlr: unable to access system"
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" configuration data\n");
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else {
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system_rev = __raw_readl(flash + CFG_REV);
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hw_bits = __raw_readl(flash + CFG_HW_BITS);
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for (i = 0; i < ETH_ALEN; i++) {
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eth_plat[0].hwaddr[i] =
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flash_readb(flash, CFG_ETH0_ADDRESS + i);
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eth_plat[1].hwaddr[i] =
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flash_readb(flash, CFG_ETH1_ADDRESS + i);
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}
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__raw_writew(FLASH_CMD_READ_ID, flash);
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system_serial_high = flash_readw(flash, FLASH_SER_OFF);
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system_serial_high <<= 16;
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system_serial_high |= flash_readw(flash, FLASH_SER_OFF + 2);
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system_serial_low = flash_readw(flash, FLASH_SER_OFF + 4);
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system_serial_low <<= 16;
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system_serial_low |= flash_readw(flash, FLASH_SER_OFF + 6);
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__raw_writew(FLASH_CMD_READ_ARRAY, flash);
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iounmap(flash);
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}
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switch (hw_bits & (CFG_HW_HAS_UART0 | CFG_HW_HAS_UART1)) {
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case CFG_HW_HAS_UART0:
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memset(&uart_data[1], 0, sizeof(uart_data[1]));
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device_uarts.num_resources = 1;
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break;
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case CFG_HW_HAS_UART1:
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device_uarts.dev.platform_data = &uart_data[1];
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device_uarts.resource = &uart_resources[1];
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device_uarts.num_resources = 1;
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break;
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}
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if (hw_bits & (CFG_HW_HAS_UART0 | CFG_HW_HAS_UART1))
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device_tab[devices++] = &device_uarts; /* max index 1 */
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if (hw_bits & CFG_HW_HAS_ETH0)
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device_tab[devices++] = &device_eth_tab[0]; /* max index 2 */
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if (hw_bits & CFG_HW_HAS_ETH1)
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device_tab[devices++] = &device_eth_tab[1]; /* max index 3 */
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if (hw_bits & CFG_HW_HAS_HSS0)
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device_tab[devices++] = &device_hss_tab[0]; /* max index 4 */
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if (hw_bits & CFG_HW_HAS_HSS1)
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device_tab[devices++] = &device_hss_tab[1]; /* max index 5 */
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if (hw_bits & CFG_HW_HAS_EEPROM)
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device_tab[devices++] = &device_i2c; /* max index 6 */
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gpio_line_config(GPIO_SCL, IXP4XX_GPIO_OUT);
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gpio_line_config(GPIO_SDA, IXP4XX_GPIO_OUT);
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gpio_line_config(GPIO_STR, IXP4XX_GPIO_OUT);
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gpio_line_config(GPIO_HSS0_RTS_N, IXP4XX_GPIO_OUT);
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gpio_line_config(GPIO_HSS1_RTS_N, IXP4XX_GPIO_OUT);
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gpio_line_config(GPIO_HSS0_DCD_N, IXP4XX_GPIO_IN);
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gpio_line_config(GPIO_HSS1_DCD_N, IXP4XX_GPIO_IN);
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set_irq_type(IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N), IRQ_TYPE_EDGE_BOTH);
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set_irq_type(IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N), IRQ_TYPE_EDGE_BOTH);
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set_control(CONTROL_HSS0_DTR_N, 1);
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set_control(CONTROL_HSS1_DTR_N, 1);
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set_control(CONTROL_EEPROM_WC_N, 1);
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set_control(CONTROL_PCI_RESET_N, 1);
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output_control();
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msleep(1); /* Wait for PCI devices to initialize */
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flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
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flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
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platform_add_devices(device_tab, devices);
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}
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#ifdef CONFIG_PCI
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static void __init gmlr_pci_preinit(void)
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{
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set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHA), IRQ_TYPE_LEVEL_LOW);
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set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHB), IRQ_TYPE_LEVEL_LOW);
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set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_NEC), IRQ_TYPE_LEVEL_LOW);
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set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_MPCI), IRQ_TYPE_LEVEL_LOW);
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ixp4xx_pci_preinit();
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}
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static void __init gmlr_pci_postinit(void)
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{
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if ((hw_bits & CFG_HW_USB_PORTS) >= 2 &&
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(hw_bits & CFG_HW_USB_PORTS) < 5) {
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/* need to adjust number of USB ports on NEC chip */
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u32 value, addr = BIT(32 - SLOT_NEC) | 0xE0;
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if (!ixp4xx_pci_read(addr, NP_CMD_CONFIGREAD, &value)) {
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value &= ~7;
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value |= (hw_bits & CFG_HW_USB_PORTS);
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ixp4xx_pci_write(addr, NP_CMD_CONFIGWRITE, value);
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}
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}
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}
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static int __init gmlr_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
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{
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switch(slot) {
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case SLOT_ETHA: return IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHA);
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case SLOT_ETHB: return IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHB);
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case SLOT_NEC: return IXP4XX_GPIO_IRQ(GPIO_IRQ_NEC);
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default: return IXP4XX_GPIO_IRQ(GPIO_IRQ_MPCI);
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}
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}
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static struct hw_pci gmlr_hw_pci __initdata = {
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.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
|