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543 lines
14 KiB
543 lines
14 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* intel_mid_sfi.c: Intel MID SFI initialization code |
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* |
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* (C) Copyright 2013 Intel Corporation |
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* Author: Sathyanarayanan Kuppuswamy <[email protected]> |
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*/ |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/interrupt.h> |
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#include <linux/scatterlist.h> |
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#include <linux/sfi.h> |
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#include <linux/spi/spi.h> |
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#include <linux/i2c.h> |
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#include <linux/skbuff.h> |
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#include <linux/gpio.h> |
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#include <linux/gpio_keys.h> |
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#include <linux/input.h> |
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#include <linux/platform_device.h> |
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#include <linux/irq.h> |
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#include <linux/export.h> |
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#include <linux/notifier.h> |
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#include <linux/mmc/core.h> |
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#include <linux/mmc/card.h> |
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#include <linux/blkdev.h> |
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#include <asm/setup.h> |
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#include <asm/mpspec_def.h> |
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#include <asm/hw_irq.h> |
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#include <asm/apic.h> |
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#include <asm/io_apic.h> |
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#include <asm/intel-mid.h> |
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#include <asm/intel_mid_vrtc.h> |
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#include <asm/io.h> |
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#include <asm/i8259.h> |
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#include <asm/intel_scu_ipc.h> |
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#include <asm/apb_timer.h> |
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#include <asm/reboot.h> |
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#define SFI_SIG_OEM0 "OEM0" |
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#define MAX_IPCDEVS 24 |
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#define MAX_SCU_SPI 24 |
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#define MAX_SCU_I2C 24 |
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static struct platform_device *ipc_devs[MAX_IPCDEVS]; |
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static struct spi_board_info *spi_devs[MAX_SCU_SPI]; |
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static struct i2c_board_info *i2c_devs[MAX_SCU_I2C]; |
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static struct sfi_gpio_table_entry *gpio_table; |
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static struct sfi_timer_table_entry sfi_mtimer_array[SFI_MTMR_MAX_NUM]; |
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static int ipc_next_dev; |
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static int spi_next_dev; |
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static int i2c_next_dev; |
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static int i2c_bus[MAX_SCU_I2C]; |
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static int gpio_num_entry; |
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static u32 sfi_mtimer_usage[SFI_MTMR_MAX_NUM]; |
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int sfi_mrtc_num; |
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int sfi_mtimer_num; |
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struct sfi_rtc_table_entry sfi_mrtc_array[SFI_MRTC_MAX]; |
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EXPORT_SYMBOL_GPL(sfi_mrtc_array); |
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struct blocking_notifier_head intel_scu_notifier = |
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BLOCKING_NOTIFIER_INIT(intel_scu_notifier); |
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EXPORT_SYMBOL_GPL(intel_scu_notifier); |
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#define intel_mid_sfi_get_pdata(dev, priv) \ |
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((dev)->get_platform_data ? (dev)->get_platform_data(priv) : NULL) |
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/* parse all the mtimer info to a static mtimer array */ |
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int __init sfi_parse_mtmr(struct sfi_table_header *table) |
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{ |
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struct sfi_table_simple *sb; |
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struct sfi_timer_table_entry *pentry; |
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struct mpc_intsrc mp_irq; |
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int totallen; |
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sb = (struct sfi_table_simple *)table; |
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if (!sfi_mtimer_num) { |
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sfi_mtimer_num = SFI_GET_NUM_ENTRIES(sb, |
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struct sfi_timer_table_entry); |
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pentry = (struct sfi_timer_table_entry *) sb->pentry; |
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totallen = sfi_mtimer_num * sizeof(*pentry); |
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memcpy(sfi_mtimer_array, pentry, totallen); |
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} |
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pr_debug("SFI MTIMER info (num = %d):\n", sfi_mtimer_num); |
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pentry = sfi_mtimer_array; |
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for (totallen = 0; totallen < sfi_mtimer_num; totallen++, pentry++) { |
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pr_debug("timer[%d]: paddr = 0x%08x, freq = %dHz, irq = %d\n", |
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totallen, (u32)pentry->phys_addr, |
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pentry->freq_hz, pentry->irq); |
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mp_irq.type = MP_INTSRC; |
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mp_irq.irqtype = mp_INT; |
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mp_irq.irqflag = MP_IRQTRIG_EDGE | MP_IRQPOL_ACTIVE_HIGH; |
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mp_irq.srcbus = MP_BUS_ISA; |
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mp_irq.srcbusirq = pentry->irq; /* IRQ */ |
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mp_irq.dstapic = MP_APIC_ALL; |
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mp_irq.dstirq = pentry->irq; |
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mp_save_irq(&mp_irq); |
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mp_map_gsi_to_irq(pentry->irq, IOAPIC_MAP_ALLOC, NULL); |
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} |
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return 0; |
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} |
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struct sfi_timer_table_entry *sfi_get_mtmr(int hint) |
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{ |
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int i; |
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if (hint < sfi_mtimer_num) { |
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if (!sfi_mtimer_usage[hint]) { |
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pr_debug("hint taken for timer %d irq %d\n", |
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hint, sfi_mtimer_array[hint].irq); |
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sfi_mtimer_usage[hint] = 1; |
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return &sfi_mtimer_array[hint]; |
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} |
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} |
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/* take the first timer available */ |
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for (i = 0; i < sfi_mtimer_num;) { |
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if (!sfi_mtimer_usage[i]) { |
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sfi_mtimer_usage[i] = 1; |
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return &sfi_mtimer_array[i]; |
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} |
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i++; |
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} |
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return NULL; |
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} |
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void sfi_free_mtmr(struct sfi_timer_table_entry *mtmr) |
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{ |
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int i; |
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for (i = 0; i < sfi_mtimer_num;) { |
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if (mtmr->irq == sfi_mtimer_array[i].irq) { |
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sfi_mtimer_usage[i] = 0; |
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return; |
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} |
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i++; |
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} |
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} |
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/* parse all the mrtc info to a global mrtc array */ |
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int __init sfi_parse_mrtc(struct sfi_table_header *table) |
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{ |
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struct sfi_table_simple *sb; |
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struct sfi_rtc_table_entry *pentry; |
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struct mpc_intsrc mp_irq; |
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int totallen; |
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sb = (struct sfi_table_simple *)table; |
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if (!sfi_mrtc_num) { |
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sfi_mrtc_num = SFI_GET_NUM_ENTRIES(sb, |
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struct sfi_rtc_table_entry); |
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pentry = (struct sfi_rtc_table_entry *)sb->pentry; |
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totallen = sfi_mrtc_num * sizeof(*pentry); |
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memcpy(sfi_mrtc_array, pentry, totallen); |
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} |
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pr_debug("SFI RTC info (num = %d):\n", sfi_mrtc_num); |
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pentry = sfi_mrtc_array; |
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for (totallen = 0; totallen < sfi_mrtc_num; totallen++, pentry++) { |
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pr_debug("RTC[%d]: paddr = 0x%08x, irq = %d\n", |
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totallen, (u32)pentry->phys_addr, pentry->irq); |
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mp_irq.type = MP_INTSRC; |
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mp_irq.irqtype = mp_INT; |
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mp_irq.irqflag = MP_IRQTRIG_LEVEL | MP_IRQPOL_ACTIVE_LOW; |
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mp_irq.srcbus = MP_BUS_ISA; |
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mp_irq.srcbusirq = pentry->irq; /* IRQ */ |
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mp_irq.dstapic = MP_APIC_ALL; |
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mp_irq.dstirq = pentry->irq; |
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mp_save_irq(&mp_irq); |
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mp_map_gsi_to_irq(pentry->irq, IOAPIC_MAP_ALLOC, NULL); |
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} |
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return 0; |
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} |
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/* |
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* Parsing GPIO table first, since the DEVS table will need this table |
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* to map the pin name to the actual pin. |
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*/ |
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static int __init sfi_parse_gpio(struct sfi_table_header *table) |
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{ |
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struct sfi_table_simple *sb; |
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struct sfi_gpio_table_entry *pentry; |
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int num, i; |
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if (gpio_table) |
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return 0; |
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sb = (struct sfi_table_simple *)table; |
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num = SFI_GET_NUM_ENTRIES(sb, struct sfi_gpio_table_entry); |
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pentry = (struct sfi_gpio_table_entry *)sb->pentry; |
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gpio_table = kmemdup(pentry, num * sizeof(*pentry), GFP_KERNEL); |
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if (!gpio_table) |
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return -1; |
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gpio_num_entry = num; |
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pr_debug("GPIO pin info:\n"); |
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for (i = 0; i < num; i++, pentry++) |
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pr_debug("info[%2d]: controller = %16.16s, pin_name = %16.16s," |
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" pin = %d\n", i, |
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pentry->controller_name, |
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pentry->pin_name, |
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pentry->pin_no); |
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return 0; |
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} |
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int get_gpio_by_name(const char *name) |
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{ |
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struct sfi_gpio_table_entry *pentry = gpio_table; |
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int i; |
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if (!pentry) |
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return -1; |
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for (i = 0; i < gpio_num_entry; i++, pentry++) { |
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if (!strncmp(name, pentry->pin_name, SFI_NAME_LEN)) |
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return pentry->pin_no; |
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} |
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return -EINVAL; |
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} |
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static void __init intel_scu_ipc_device_register(struct platform_device *pdev) |
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{ |
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if (ipc_next_dev == MAX_IPCDEVS) |
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pr_err("too many SCU IPC devices"); |
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else |
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ipc_devs[ipc_next_dev++] = pdev; |
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} |
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static void __init intel_scu_spi_device_register(struct spi_board_info *sdev) |
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{ |
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struct spi_board_info *new_dev; |
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if (spi_next_dev == MAX_SCU_SPI) { |
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pr_err("too many SCU SPI devices"); |
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return; |
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} |
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new_dev = kzalloc(sizeof(*sdev), GFP_KERNEL); |
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if (!new_dev) { |
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pr_err("failed to alloc mem for delayed spi dev %s\n", |
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sdev->modalias); |
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return; |
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} |
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*new_dev = *sdev; |
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spi_devs[spi_next_dev++] = new_dev; |
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} |
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static void __init intel_scu_i2c_device_register(int bus, |
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struct i2c_board_info *idev) |
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{ |
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struct i2c_board_info *new_dev; |
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if (i2c_next_dev == MAX_SCU_I2C) { |
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pr_err("too many SCU I2C devices"); |
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return; |
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} |
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new_dev = kzalloc(sizeof(*idev), GFP_KERNEL); |
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if (!new_dev) { |
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pr_err("failed to alloc mem for delayed i2c dev %s\n", |
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idev->type); |
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return; |
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} |
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*new_dev = *idev; |
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i2c_bus[i2c_next_dev] = bus; |
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i2c_devs[i2c_next_dev++] = new_dev; |
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} |
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/* Called by IPC driver */ |
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void intel_scu_devices_create(void) |
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{ |
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int i; |
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for (i = 0; i < ipc_next_dev; i++) |
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platform_device_add(ipc_devs[i]); |
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for (i = 0; i < spi_next_dev; i++) |
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spi_register_board_info(spi_devs[i], 1); |
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for (i = 0; i < i2c_next_dev; i++) { |
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struct i2c_adapter *adapter; |
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struct i2c_client *client; |
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adapter = i2c_get_adapter(i2c_bus[i]); |
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if (adapter) { |
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client = i2c_new_client_device(adapter, i2c_devs[i]); |
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if (IS_ERR(client)) |
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pr_err("can't create i2c device %s\n", |
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i2c_devs[i]->type); |
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} else |
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i2c_register_board_info(i2c_bus[i], i2c_devs[i], 1); |
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} |
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intel_scu_notifier_post(SCU_AVAILABLE, NULL); |
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} |
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EXPORT_SYMBOL_GPL(intel_scu_devices_create); |
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/* Called by IPC driver */ |
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void intel_scu_devices_destroy(void) |
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{ |
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int i; |
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intel_scu_notifier_post(SCU_DOWN, NULL); |
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for (i = 0; i < ipc_next_dev; i++) |
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platform_device_del(ipc_devs[i]); |
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} |
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EXPORT_SYMBOL_GPL(intel_scu_devices_destroy); |
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static void __init install_irq_resource(struct platform_device *pdev, int irq) |
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{ |
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/* Single threaded */ |
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static struct resource res __initdata = { |
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.name = "IRQ", |
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.flags = IORESOURCE_IRQ, |
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}; |
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res.start = irq; |
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platform_device_add_resources(pdev, &res, 1); |
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} |
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static void __init sfi_handle_ipc_dev(struct sfi_device_table_entry *pentry, |
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struct devs_id *dev) |
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{ |
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struct platform_device *pdev; |
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void *pdata = NULL; |
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pr_debug("IPC bus, name = %16.16s, irq = 0x%2x\n", |
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pentry->name, pentry->irq); |
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/* |
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* We need to call platform init of IPC devices to fill misc_pdata |
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* structure. It will be used in msic_init for initialization. |
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*/ |
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pdata = intel_mid_sfi_get_pdata(dev, pentry); |
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if (IS_ERR(pdata)) |
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return; |
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/* |
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* On Medfield the platform device creation is handled by the MSIC |
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* MFD driver so we don't need to do it here. |
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*/ |
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if (dev->msic && intel_mid_has_msic()) |
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return; |
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pdev = platform_device_alloc(pentry->name, 0); |
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if (pdev == NULL) { |
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pr_err("out of memory for SFI platform device '%s'.\n", |
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pentry->name); |
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return; |
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} |
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install_irq_resource(pdev, pentry->irq); |
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pdev->dev.platform_data = pdata; |
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if (dev->delay) |
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intel_scu_ipc_device_register(pdev); |
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else |
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platform_device_add(pdev); |
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} |
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static void __init sfi_handle_spi_dev(struct sfi_device_table_entry *pentry, |
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struct devs_id *dev) |
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{ |
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struct spi_board_info spi_info; |
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void *pdata = NULL; |
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memset(&spi_info, 0, sizeof(spi_info)); |
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strncpy(spi_info.modalias, pentry->name, SFI_NAME_LEN); |
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spi_info.irq = ((pentry->irq == (u8)0xff) ? 0 : pentry->irq); |
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spi_info.bus_num = pentry->host_num; |
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spi_info.chip_select = pentry->addr; |
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spi_info.max_speed_hz = pentry->max_freq; |
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pr_debug("SPI bus=%d, name=%16.16s, irq=0x%2x, max_freq=%d, cs=%d\n", |
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spi_info.bus_num, |
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spi_info.modalias, |
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spi_info.irq, |
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spi_info.max_speed_hz, |
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spi_info.chip_select); |
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pdata = intel_mid_sfi_get_pdata(dev, &spi_info); |
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if (IS_ERR(pdata)) |
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return; |
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spi_info.platform_data = pdata; |
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if (dev->delay) |
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intel_scu_spi_device_register(&spi_info); |
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else |
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spi_register_board_info(&spi_info, 1); |
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} |
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static void __init sfi_handle_i2c_dev(struct sfi_device_table_entry *pentry, |
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struct devs_id *dev) |
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{ |
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struct i2c_board_info i2c_info; |
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void *pdata = NULL; |
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memset(&i2c_info, 0, sizeof(i2c_info)); |
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strncpy(i2c_info.type, pentry->name, SFI_NAME_LEN); |
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i2c_info.irq = ((pentry->irq == (u8)0xff) ? 0 : pentry->irq); |
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i2c_info.addr = pentry->addr; |
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pr_debug("I2C bus = %d, name = %16.16s, irq = 0x%2x, addr = 0x%x\n", |
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pentry->host_num, |
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i2c_info.type, |
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i2c_info.irq, |
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i2c_info.addr); |
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pdata = intel_mid_sfi_get_pdata(dev, &i2c_info); |
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i2c_info.platform_data = pdata; |
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if (IS_ERR(pdata)) |
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return; |
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if (dev->delay) |
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intel_scu_i2c_device_register(pentry->host_num, &i2c_info); |
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else |
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i2c_register_board_info(pentry->host_num, &i2c_info, 1); |
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} |
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static void __init sfi_handle_sd_dev(struct sfi_device_table_entry *pentry, |
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struct devs_id *dev) |
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{ |
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struct mid_sd_board_info sd_info; |
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void *pdata; |
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memset(&sd_info, 0, sizeof(sd_info)); |
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strncpy(sd_info.name, pentry->name, SFI_NAME_LEN); |
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sd_info.bus_num = pentry->host_num; |
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sd_info.max_clk = pentry->max_freq; |
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sd_info.addr = pentry->addr; |
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pr_debug("SD bus = %d, name = %16.16s, max_clk = %d, addr = 0x%x\n", |
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sd_info.bus_num, |
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sd_info.name, |
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sd_info.max_clk, |
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sd_info.addr); |
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pdata = intel_mid_sfi_get_pdata(dev, &sd_info); |
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if (IS_ERR(pdata)) |
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return; |
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/* Nothing we can do with this for now */ |
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sd_info.platform_data = pdata; |
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pr_debug("Successfully registered %16.16s", sd_info.name); |
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} |
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extern struct devs_id *const __x86_intel_mid_dev_start[], |
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*const __x86_intel_mid_dev_end[]; |
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static struct devs_id __init *get_device_id(u8 type, char *name) |
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{ |
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struct devs_id *const *dev_table; |
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for (dev_table = __x86_intel_mid_dev_start; |
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dev_table < __x86_intel_mid_dev_end; dev_table++) { |
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struct devs_id *dev = *dev_table; |
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if (dev->type == type && |
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!strncmp(dev->name, name, SFI_NAME_LEN)) { |
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return dev; |
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} |
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} |
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return NULL; |
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} |
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static int __init sfi_parse_devs(struct sfi_table_header *table) |
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{ |
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struct sfi_table_simple *sb; |
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struct sfi_device_table_entry *pentry; |
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struct devs_id *dev = NULL; |
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int num, i, ret; |
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int polarity; |
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struct irq_alloc_info info; |
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sb = (struct sfi_table_simple *)table; |
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num = SFI_GET_NUM_ENTRIES(sb, struct sfi_device_table_entry); |
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pentry = (struct sfi_device_table_entry *)sb->pentry; |
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for (i = 0; i < num; i++, pentry++) { |
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int irq = pentry->irq; |
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if (irq != (u8)0xff) { /* native RTE case */ |
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/* these SPI2 devices are not exposed to system as PCI |
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* devices, but they have separate RTE entry in IOAPIC |
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* so we have to enable them one by one here |
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*/ |
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if (intel_mid_identify_cpu() == |
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INTEL_MID_CPU_CHIP_TANGIER) { |
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if (!strncmp(pentry->name, "r69001-ts-i2c", 13)) |
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/* active low */ |
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polarity = 1; |
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else if (!strncmp(pentry->name, |
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"synaptics_3202", 14)) |
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/* active low */ |
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polarity = 1; |
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else if (irq == 41) |
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/* fast_int_1 */ |
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polarity = 1; |
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else |
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/* active high */ |
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polarity = 0; |
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} else { |
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/* PNW and CLV go with active low */ |
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polarity = 1; |
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} |
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ioapic_set_alloc_attr(&info, NUMA_NO_NODE, 1, polarity); |
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ret = mp_map_gsi_to_irq(irq, IOAPIC_MAP_ALLOC, &info); |
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WARN_ON(ret < 0); |
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} |
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dev = get_device_id(pentry->type, pentry->name); |
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|
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if (!dev) |
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continue; |
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|
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switch (pentry->type) { |
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case SFI_DEV_TYPE_IPC: |
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sfi_handle_ipc_dev(pentry, dev); |
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break; |
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case SFI_DEV_TYPE_SPI: |
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sfi_handle_spi_dev(pentry, dev); |
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break; |
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case SFI_DEV_TYPE_I2C: |
|
sfi_handle_i2c_dev(pentry, dev); |
|
break; |
|
case SFI_DEV_TYPE_SD: |
|
sfi_handle_sd_dev(pentry, dev); |
|
break; |
|
case SFI_DEV_TYPE_UART: |
|
case SFI_DEV_TYPE_HSI: |
|
default: |
|
break; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static int __init intel_mid_platform_init(void) |
|
{ |
|
sfi_table_parse(SFI_SIG_GPIO, NULL, NULL, sfi_parse_gpio); |
|
sfi_table_parse(SFI_SIG_DEVS, NULL, NULL, sfi_parse_devs); |
|
return 0; |
|
} |
|
arch_initcall(intel_mid_platform_init);
|
|
|