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![Krzysztof Halasa](/assets/img/avatar_default.png)
Commit 098e30f655
"ARM: ixp4xx: stop broadcasting the custom GPIO API"
changed the internal gpio code of ixp4xx to be accessible only from
common.c, but unfortunately that broke the Goramo MultiLink code, which
uses this API.
arch/arm/mach-ixp4xx/goramo_mlr.c: In function 'set_scl':
arch/arm/mach-ixp4xx/goramo_mlr.c:82: error: implicit declaration of function 'gpio_line_set'
arch/arm/mach-ixp4xx/goramo_mlr.c: In function 'output_control':
arch/arm/mach-ixp4xx/goramo_mlr.c:111: error: implicit declaration of function 'gpio_line_config'
arch/arm/mach-ixp4xx/goramo_mlr.c:111: error: 'IXP4XX_GPIO_OUT' undeclared
arch/arm/mach-ixp4xx/goramo_mlr.c: In function 'hss_dcd_irq':
arch/arm/mach-ixp4xx/goramo_mlr.c:155: error: implicit declaration of function 'gpio_line_get'
arch/arm/mach-ixp4xx/goramo_mlr.c: In function 'gmlr_init':
arch/arm/mach-ixp4xx/goramo_mlr.c:416: error: 'IXP4XX_GPIO_OUT' undeclared
arch/arm/mach-ixp4xx/goramo_mlr.c:421: error: 'IXP4XX_GPIO_IN' undeclared
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
517 lines
12 KiB
C
517 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/gpio.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/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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#include <asm/system_info.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_set_value(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_set_value(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_set_value(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_direction_output(GPIO_SCL, 1);
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gpio_direction_output(GPIO_SDA, 1);
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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 port = (irq == IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N));
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int i = gpio_get_value(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N);
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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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i = gpio_get_value(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N);
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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_set_value(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_set_value(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[7] __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_request(GPIO_SCL, "SCL/clock");
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gpio_request(GPIO_SDA, "SDA/data");
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gpio_request(GPIO_STR, "strobe");
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gpio_request(GPIO_HSS0_RTS_N, "HSS0 RTS");
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gpio_request(GPIO_HSS1_RTS_N, "HSS1 RTS");
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gpio_request(GPIO_HSS0_DCD_N, "HSS0 DCD");
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gpio_request(GPIO_HSS1_DCD_N, "HSS1 DCD");
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gpio_direction_output(GPIO_SCL, 1);
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gpio_direction_output(GPIO_SDA, 1);
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gpio_direction_output(GPIO_STR, 0);
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gpio_direction_output(GPIO_HSS0_RTS_N, 1);
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gpio_direction_output(GPIO_HSS1_RTS_N, 1);
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gpio_direction_input(GPIO_HSS0_DCD_N);
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gpio_direction_input(GPIO_HSS1_DCD_N);
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irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N), IRQ_TYPE_EDGE_BOTH);
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irq_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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irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHA), IRQ_TYPE_LEVEL_LOW);
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irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHB), IRQ_TYPE_LEVEL_LOW);
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irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_NEC), IRQ_TYPE_LEVEL_LOW);
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irq_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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|
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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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|
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static int __init gmlr_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
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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 = {
|
|
.nr_controllers = 1,
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|
.ops = &ixp4xx_ops,
|
|
.preinit = gmlr_pci_preinit,
|
|
.postinit = gmlr_pci_postinit,
|
|
.setup = ixp4xx_setup,
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|
.map_irq = gmlr_map_irq,
|
|
};
|
|
|
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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);
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|
return 0;
|
|
}
|
|
|
|
subsys_initcall(gmlr_pci_init);
|
|
#endif /* CONFIG_PCI */
|
|
|
|
|
|
MACHINE_START(GORAMO_MLR, "MultiLink")
|
|
/* Maintainer: Krzysztof Halasa */
|
|
.map_io = ixp4xx_map_io,
|
|
.init_early = ixp4xx_init_early,
|
|
.init_irq = ixp4xx_init_irq,
|
|
.init_time = ixp4xx_timer_init,
|
|
.atag_offset = 0x100,
|
|
.init_machine = gmlr_init,
|
|
#if defined(CONFIG_PCI)
|
|
.dma_zone_size = SZ_64M,
|
|
#endif
|
|
.restart = ixp4xx_restart,
|
|
MACHINE_END
|